Although the most frequent forms of Down syndrome are caused by a random error, nondisjunction of chromosome 21, Down syndrome occasionally runs in families. Which of the following is the cause of this form of familial Down syndrome?
A) an inversion involving chromosome 21
B) a chromosomal aberration involving chromosome 1
C) too many X chromosomes
D) a translocation between chromosome 21 and a member of the D chromosome group
E) a maternal age effect

Answers

Answer 1
It would be option a on this case

Related Questions

Ms.Caroll went to the doctors office with pain in her right shoulder blade and learned she was having a gallbladder attack. Youre not surprised to hear about that unusual location of her pain since its known as _____.
A- Chronic pain
B- Referred pain
C- Receptive field
D- Phantom limb pain

Answers

Answer:

B. Referred pain

Explanation:

Referred pain is when pain in one part of your body is caused by pain in another part of your body.

The pain that Ms. Caroll is experiencing in her gallbladder is causing her to experience pain in her right shoulder blade.

Also, when the gallbladder is inflamed and swollen, it irritates the phrenic nerve which runs from the abdomen, through the chest, and into the neck. This causes pain in the right shoulder blade.

Hope this helps.

what do scientist need to look at before devleping an argument

Answers

Answer:

Because they are genuis

Explanation:

what is function of ammeter and voltmeter​

Answers

Answer:

An ammeter is a measuring device used to measure the electric current in a circuit. A voltmeter is connected in parallel with a device to measure its voltage, while an ammeter is connected in series with a device to measure its current.

Explanation:

i just did it

Answer:An ammeter is a measuring device used to measure the electric current in a circuit. A voltmeter is connected in parallel with a device to measure its voltage, while an ammeter is connected in series with a device to measure its current.

as a body cell grows larger, the ratio of _____ to volume____

Answers

as the body cell grows larger , the ratio of the cells gets smaller to volume of the surface area

As a cell grows, the ratio of surface area to volume decreases.

As the volume of the cell increases, it has more organelles and material inside. These materials have high demands for oxygen and therefore energy. The surface area is not sufficient to accomodate to the high demands of the cell which is why a cell divides in mitosis

Sometimes when we do heavy exercise, anaerobic respiration takes place in our muscle cells. What is produced during this process? (a) Alcohol and lactic acid (b) Alcohol and CO2 (c) Lactic acid and CO2 (d) Lactic acid only

Answers

Answer:

alcohol and CO2

Explanation:

answer option b

Answer:

lactic acid and CO2

Explanation:

the equation for anaerobic respiration is:

C6H1206 → 2C3H6O3 + H2O + CO2 + ENERGY

glucose  →  lactic acid + water + carbon dioxide + small amount of energy


How does an amoeba reproduce?

Answers

Answer:An amoeba uses asexual reproduction to reproduce using a process of binary fission.

Answer:

Most amoebas reproduce aesexually through mitosis. However, some are capable of reproducing meiotically (sexual reproduction)

Explanation:

Which of the following is a primary function of carbohydrates?

Choose ONE answer:

A. Acting as a long-term energy source.

B. Speeding up chemical reactions.

C. Storing genetic information.

D. Providing short-term energy storage.​

Answers

Answer: For me providing short - term energy storage is C so whatever providing short - term energy storage is on yours that's the correct answer. :D have a nice day.

Explanation: Carbohydrates are the main energy source of cells.

They provide a quick energy supply for all types of cellular activities.

The correct answer is

Providing short-term energy storage

The correct answer is option D. Providing short-term energy storage.​

What Do Carbohydrates Do to Your Body?

Carbohydrates are the main source of energy for your body: they help fuel your brain, kidneys, myocardium, and central nervous system. For example, fiber is a carbohydrate that aids digestion gives you a feeling of fullness, and lowers blood cholesterol levels.

Carbohydrate Function

Energy supply and blood sugar regulation.Gentle use of protein to generate energy.Degradation of fatty acids and prevention of ketosis.Biological recognition process.flavors and sweeteners.fiber.

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Which enzyme would be needed first to convert most plant biomass to ethanol? A. Protease B. Amylase C. Cellulase D. Lipase

Answers

Answer:

b

Explanation:

Anaerobic respiration is used in conditions that: A. require nitrogen. B. are depleted of glucose. C. have too much oxygen. D. are depleted of oxygen.

Answers

Answer:

D. Are depleted of Oxygen

Explanation:

Anaerobic respiration occurs when the amount of oxygen available is too low to support the process of aerobic respiration

Anaerobic respiration is used in conditions that are depleted of oxygen. The correct option is D.

What is anaerobic respiration?

Anaerobic respiration is the one that does not need oxygen to perform respiration. The process includes the breakdown of Glucose into ethyl alcohol, carbon dioxide, and energy in the absence of oxygen. It occurs only in the cytoplasm.

Certain bacteria and Archean perform anaerobic respiration because they are present in the region where oxygen is not present, in extreme conditions.

Many chemical processes are also done in the absence of oxygen. Like lactic acid fermentation,  decomposition, and alcoholic fermentation. When the high-intensity workout is done, the body performs anaerobic respiration.

Thus, The correct option is D. are depleted of oxygen.

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Every animal has a distinct body plan.
Which of these animals has a radially symmetrical
body plan?

Answers

Answer:

phyla Ctenophora (comb jellies) and Cnidaria (corals, sea anemones, and other jellies).

Explanation:

Hope it helps.

Answer:

I didn't mean to comment this

Explanation:

Which of the following is an example of succession in an ocean ecosystem?

Answers

Answer:

hydroseres

Explanation:

and for land xeroseres

Name the important endocrine glands present in our body

Answers

Answer:

The hypothalamus, pituitary gland, and pineal gland are in your brain. The thyroid and parathyroid glands are in your neck. The thymus is between your lungs, the adrenals are on top of your kidneys, and the pancreas is behind your stomach.

Explanation:

Hope this helps.

The endocrine system is made up of the endocrine glands that secrete hormones. Although there are eight major endocrine glands scattered throughout the body, they are still considered to be one system because they have similar functions, similar mechanisms of influence, and many important interrelationships.

These include...

Hypothalamus.

Pineal Gland.

Pituitary Gland.

Thyroid.

Parathyroid.

Thymus.

Adrenal.

Pancreas.

In order to convert prairie grass to bioethanol, what is needed after breaking down cellulose to simple sugars?
A. fermentation
B. cellulase
C. amylase
D. protease

Answers

Answer:

fermentation

Explanation:

When you ferment there will be chemical break down of the substance

What might an elevated ST segment of an ECG mean?
A. All of these
B. Cardiovascular disease
C. Impending heart attack
D. Hypertrophy

Answers

Answer:

C. Impending heart attack

The elevated ST segment of an ECG mean an impending heart attack. The correct option is C.

What is an EGC?

An electrocardiogram (ECG) is a simple test that can be utilized to check the rhythm and electrical activity of your heart. Sensors attached to the skin diagnose the electrical signals generated by your heart every time it beats.

ST-segment elevation generally signals that the involved coronary artery is completely blocked and that the heart muscle is dying.

Thus, the correct option is C.

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The countercurrent multiplier is a system by which the:______.
a. nephron loop multiplies the concentration of salts in the interstitial fluid of the kidney medulla.
b. nephron loop dilutes the concentration of solutes in the tubular fluid at its hairpin turn.
c. vasa recta secretes multiple amounts of metabolic wastes against their concentration gradient.
d. vasa recta becomes more concentrated with nitrogenous wastes than the urine.

Answers

Answer: Option A.

nephron loop multiplies the concentration of salts in the interstitial fluid of the kidney medulla.

Explanation:

countercurrent multiplier is a system that utilize energy that create osmotic gradients and enable reabsorption of water thereby increase concentration of urine. The countercurrent multiplier uses electrolyte pumps there by making the nephron loop increase the concentration of salts in the interstitial fluid of the kidney medulla because it allows the nephron to reabsorb alot of water and and increase the concentration of urine for excretion while at the same time using as little energy as possible.

Which of the following is NOT a frameshift mutation?
A. Deletion
B. Insertion
C. None of these
D. Inversion

Answers

Answer:

Inversion

Explanation:

The frameshift mutations are -Base Substitutions

                                                -Deletions

                                                -Insertions

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PLEASE MARK IT THE BRAINLIEST!

The type of mutation that is not a type of frame-shift mutation is inversion.

FRAME-SHIFT MUTATION:

A frame-shift mutation is a kind of mutation that causes the manner in which a nucleic acid sequence is read in the genetic code.

Frame-shift mutation can occur via two major means as follows: deletion and insertion.

Deletion mutation occurs when a nucleotide base is removed from the sequence while insertion mutation occurs when a nucleotide base is added to the sequence.

Deletion and insertion causes the sequence of nucleotides in DNA to be shifted. Therefore, the type of mutation that is not a type of frame-shift mutation is inversion.

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During meiosis, independent assortment determines which chromosomes a gamete inherits, while ____________ determines, within a chromosome, which material will come from the maternal and paternal version.

Answers

Answer:

Crossing over or recombination

Explanation:

Crossing over or genetic recombination is a stage in the late prophase of meiosis I where homologs lie close to each other in pairs to exchange chromosomal material creating new combination of genes as each homologs is derived from either the father or the mother.

This exchange determines the material to be inherited by the offspring producing genetic variation which males the offspring typically different from the parents (genetic variation).

In your lab you are studying the genome of venomous rattlesnakes to find the gene which codes for their venom glands. You have two
rattlesnakes, one rattlesnake has a mutation but can still produce venom. You compare his DNA to a normal rattlesnake. What type of
mutation has occurred?
Normal: AATCGCTACGCACGTCAG
Mutated: TATCGCTACGCACGTCAG
A. Deletion Mutation
B. Nonsense mutation
C. Silent Mutation
D. Missense mutation

Answers

It is actually a mis-sense mutation.
ATA on DNA is UAU on mRNA. This codon has the amino acid ‘Leu’
TAT on DNA is AUA on mRNA. This codon has the amino acid ‘Ile’
A silent mutation means that the amino acid is not changed. This is a missense mutation because the amino acid is changed but the snake is still able to produce venom.

Which activity does a local health department perform when providing health and environmental services?

Answers

Answer:

Explanation:

Local health department links up patient with adequate health care needed especially area where good health facilities is reduces and cannot be access, they prevent spread of disease by given immunizations.

They also help in avoiding spread of diseases and infections by working with other health agencies to create awareness.

In the environment, some of them ensure access to to good and clean water, they develop plans when emergency cases arises and during disaster.

Answer:

C

Explanation:

The local health departments make sure that the community's health is thoroughly assessed, thus, it is their role to oversee the day-to-day health issues in a country. For example, if there's an infectious disease, they prevent its spread by mandating some policies or protocols that people should follow. It is also their duty to respond to emergency situations that affect the health of the local people.

How are tropical rain forests and temperate forests different?
A. Rain forests have more biodiversity.
B. Rain forests have more seasonal changes.
C. Rain forests are less productive.
D. Rain forests have fewer species.

Answers

Answer:

A

Explanation:

Tropical rain forests and temperate forests different because rain forests have more biodiversity. The correct option is A.

What is the difference?

Tropical rain forests have a much greater variety of species, from plants to animals, than temperate forests. Temperate forests have a lower biodiversity because they have fewer species of trees and less variation in temperature and rainfall throughout the year.

Additionally, tropical rain forests have a much higher productivity level than temperate forests due to the constant sunlight and warm temperatures.

Tropical rain forests have a significantly higher number of species and greater overall biodiversity compared to temperate forests. This is due to factors such as a more stable climate, high levels of rainfall, and abundant sunlight, which support a wide variety of plant and animal life.

Therefore, the correct option is A.

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Which of these conclusions is most likely correct about the two pairs of atoms?

Answers

Answer:

D. Carbon and oxygen form covalent bonds but sodium and chlorine form ionic bonds

Explanation:

Chemical bonds form between the atoms of elements. The types of chemical bondings that form are: covalent bond, ionic bond and more. Covalent bonds are bonds formed when atoms share valence electrons rather than transfer it. The shared bonding is in such a way that the outermost shell of both atoms are filled. This is the case of carbon and oxygen atoms in the diagram.

On the other hand, ionic bonding involves the transfer of electrons from one atom to another in order to form electrically charged ions that are bound to one another. This is the case of sodium atom, which has one valence electron in its outermost shell and transfers it to chlorine atom, which has seven electrons in its outermost shell. The sodium atom becomes a positively charged ion (+1) while the chlorine atom becomes negatively charged (-1).

Cellular respiration converts the reactants' oxygen and glucose into carbon dioxide, water, and energy. The reverse reaction of photosynthesis converts reactants of carbon dioxide and water into oxygen and glucose. These two reactions are part of which biogeochemical cycle?

Answers

Answer:

Photosynthesis and Cellular respiration take place in the carbon cycle

Explanation:

One of 4 biogeochemical cycles

carbon cycle

Carbon moves from living things to the atmosphere. Each time you exhale, you are releasing carbon dioxide gas (CO2) into the atmosphere. Animals and plants need to get rid of carbon dioxide gas through a process called respiration.

Photosynthesis removes carbon dioxide from the atmosphere, while cellular respiration releases it into the environment. Cellular respiration and photosynthesis are significant carbon cycle processes. The carbon cycle refers to the procedures used to recycle carbon in the biosphere.

What cellular respiration in biogeochemical cycle?

The exchange of carbon between the biosphere, geosphere, hydrosphere, atmosphere, and pedosphere occurs in one of the biogeochemical cycles. Photosynthesis occurs when carbon dioxide and sunshine are combined in green plants.

Therefore, living beings release carbon into the atmosphere. You emit carbon dioxide (CO2) into the atmosphere with each exhalation. Through a process known as respiration, organisms such as animals and plants must expel carbon dioxide gas.

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Sickle cell disease provides an example for which principle of molecular genetics? A. A point mutation always causes a significant change in phenotype. B. A point mutation always causes a change to an amino acid sequence, which may affect phenotype. C. A significant change in phenotype may cause a genetic mutation. D. A change to one amino acid in a protein may cause a significant change in phenotype.

Answers

Answer:D. A change to one amino acid in a protein may cause a significant change in phenotype.

Explain Hertzspeung-Russell diagram relationship to stars life cycles

Answers

The sun provides a handy benchmark for describing other stars. The mass of this solar system's sun gives us a unit for measuring other stars' masses. Similarly, the sun's luminosity and surface temperature define the center of the Hertzsprung-Russell Diagram (H-R Diagram). Plotting a star on this chart reliably predicts other qualities of the star, such as mass and age. The main sequence phase of a star's life cycle is that time during which hydrogen fusion takes place in its core. But in terms of the H-R Diagram, "main sequence" also refers to a roughly diagonal, slightly S-curved line stretching between the upper-left and lower-right corners on which main sequence stars chart. They maintain a predictable relationship between luminosity and temperature: the brighter, the hotter. Both of these traits increase with a star's mass; a star indicated closer to the upper-left corner will be "heavier" than our sun, while lower-right main sequence stars will be "lighter."

Red Giants

Should astronomers plot a newly discovered star in the upper-right corner of the H-R Diagram, being both bright yet cool, they'll immediately know what phase of its life cycle the star is enduring. A red giant's core, hot enough to fuse helium and even heavier elements, has pushed its shell layers so far out that they can cool into the red spectrum. They owe their great luminosity not to their temperature, but to their size: bigger stars radiate more light energy.

omosexuality is seen only in humans. has been documented for only a few hundred years in only a few societies. likely reflects the input of a number of genes and environmental factors. is inherited from a mutation on the X chromosome. is only the result of environmental influences.

Answers

Answer:

Homosexuality likely reflects the input of a number of genes and environmental factors

Explanation:

Sexual orientation can be defined as the attraction that experiments an individual self-identified with a particular gender (either male or female) to other persons according to their sex, this orientation may be classified into three categories: heterosexual (attraction for people of opposite sex), homosexual (same-sex) and bisexual (either sex). In the last years, the mechanisms involved in sexual orientation have been subject to intense research. In this regard, the main part of the scientific community agrees that sexual orientation is the result of the complex interaction between genetic and environmental factors. This hypothesis is supported by the fact that genes whose expression is associated with particular human behaviors, including sexual orientation, have been recently identified and mapped. Moreover, it has been shown that environmental factors such as, for example, hormone exposure before birth (i.e., during fetal programming) may also determine sexual orientation.

Some individuals can be heterozygous for a particular mutation.This means that one of their chromosomes is normal and the other is mutated in some way. Approximately ___ of the gametes produced by an individual heterozygous for a deletion will be non viable.

Answers

Answer:

1/2 (50%)

Explanation:

During meiosis, homologous pairs of chromosomes are separated in order to form haploid cells, and this separation or assortment is known to be a random process. In consequence, the chromosome carrying the mutation will have a 1/2 (50%) chance of being inherited in the gamete that, after fertilization, produces a non-viable organism. In consequence, the non-mutated chromosome also will have a 1/2 chance of occurring in the offspring

Four importance of farm record​

Answers

Explanations.

Farming record is a document that is used

to keep account different activities,event and materials regarding the farming records.

During interphase, how does a cell prepare for division? Describe cell division, including the processes of mitosis and cytokinesis. Be sure to describe the mitotic steps.

Answers

Answer:

During interphase, the cell copies its DNA in preparation for mitosis. Interphase is the 'daily living' or metabolic phase of the cell, in which the cell obtains nutrients and metabolizes them, grows, reads its DNA, and conducts other "normal" cell functions.

Explanation:

_________is severe pain and constriction about the heart, usually radiating to the left shoulder and down the left arm and creating the feeling of pressure in the anterior chest.

Answers

Answer:

Heart attack

Explanation:

Heart attack is the death of a part of heart muscles and severe pain that causes heart constriction having pain in the chest which spread to the left shoulder and down the arm thereby causing the feeling of pressure in the chest.

This is caused when a blood clots blocks blood flow to the heart thereby leading makes the tissue to loss oxygen and die.

The symptom of heart attack are;

pain in the chest, neck, back or arms, fatigue, lightheadedness, abnormal heartbeat and anxiety, nausea.

Treatment ranges from surgery, medication , rehabilitation e.t.c.

Fine-tune reabsorption of calcium ions occurs in which of the following regions? Group of answer choices proximal tubule loop of Henle early distal tubule late distal tubule and collecting duct

Answers

Answer:

Proximal tubule

Explanation:

Calcium is an important element in the body with majority of its percentage located in the bones. Its ions perform different functions in the body which includes muscle contraction, hormones secretion and including all other functions.

Calcium ion is absorbed in the intestines and then reabsorbed in the kidney. Much percentage of calcium ions is reabsorbed by passive mechanisms in the proximal convoluted tubule of the kidney tubule as compared to all other parts of the kidney tubule.

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A 30 year $1,000 par 4 3/4% Treasury Bond is quoted at 95-11 - 95-15. The note pays interest on Jan 1st and Jul 1st. A customer buys 1 bond at the ask price. What is the current yield, disregarding commissions Determine whether the outcome of the following hypothesis test was a correct decision, a type I error, or a type II error. Claim: "Less than 40% of college students graduate with student loan debt." A hypothesis test of this claim resulted in the decision to reject H0. The actual percentage of college graduates with student loan debt is 45%. Given a normal population which has a mean of 110 and a standard deviation of 5, find the probability that a random sample of 49 has a mean between 109 and 112. Report your answer to four decimal places. The wife of a client with alcohol dependency tells the nurse, "Im tired of making excuses for him to his boss and coworkers when he cant make it into work. I believe him every time he says hes going to quit." The nurse recognizes the wifes statement as indicating which behavior? PLEASE HELP ME! I will mark you as BRAINLIEST if you answer this correctly. Can someone answer all of the following questions please!! Will mark branliest An investment adviser, age 33 and married, needs cash for the down payment to buy her first house. She asks her father if he can "help out" with the down payment. Her father is one of her advisory clients. Which statement is TRUE about this situation how to help each other A 2-digit number is increased by 36 when the digits are reversed. The sum of the digits is 10. What is the original number? T-Shirt Enterprises is selling in a purely competitive market. It is producing 3,000 units, selling them for $2.00 each. At this level of output, the average total cost is 2.50 and the average variable cost is $2.20. Based on these data, the firm should Haroun and the Sea of Stories how does the author Salman Rushdie uses the motif of silenced voices to develop a theme? Mr. Weaver invested part of his $6000 inheritance in an account that earns 4%simple interest and the other part in an account that earns 7% simple interest.How much did he invest in each account if the two accounts earned $360 afterthe first year? The table below shows the electronegativity values of various elements on the periodic table. Electronegativities A partial periodic table. Which pair of atoms would form a covalent bond ? calcium (Ca) and bromine (Br) rubidium (Rb) and sulfur (S) cesium (Cs) and nitrogen (N) oxygen (O) and chlorine (Cl) i know this not school related but my grandmothers RCA RCT6272W23 tablet is saying type password to decrypt storage and i dont know what to do someone please help In the diagram, AC and PR are vertical lines, while CB is a horizontal line segment. If CR : RB = 2 : 3, what are the coordinates of point Q? A. (-2, -4) B. (-1, -5) C. (-3, -3) D. (0, -6) Creative Sound Systems sold investments, land, and its own common stock for $31.0 million, $15.1 million, and $40.2 million, respectively. Creative Sound Systems also purchased treasury stock, equipment, and a patent for $21.1 million, $25.1 million, and $12.1 million, respectively. A) What amount should the company report as net cash flows from investing activities? B) What amount should Creative Sound Systems report as net cash flows from financing activities? Psychology 1A Question: Of the following, who would be the most likely to suffer long-term negative effects of stress?Answers:Group of answer choicesEllen, a paramedic who was involved with the rescue of survivors of a major plane crashMarissa, an unemployed mom raising three kids in an unsafe neighborhoodRon, an electrician whose wife of 28 years has just diedJin, a manager who has just been laid off from his job after working there for 10 years A sailor strikes the side of his ship just below the surface of the sea. He hears the echo of the wave reflected from the ocean floor directly below 2.5 ss later.How deep is the ocean at this point? (Note: Use the bulk modulus method to determine the speed of sound in this fluid, rather than using a tabluated value.) _____ m Why did state and federal governments begin contracting private corporations to build and run prisons? What is the inclination of a line through the points(5,14) and (9,18)