Duchenne muscular dystrophy (DMD) is a recessive, sex-linked disorder carried on the X chromosome. If a woman who is a carrier of DMD and a man without the disorder have children, which outcome is possible?

a. All of their sons and half of their daughters could have DMD.
b. Half of their sons and half of their daughters could have DMD.
c.Half of their sons and none of their daughters could have DMD.
d. None of their sons and half of their daughters could have DMD.

Answers

Answer 1

Answer:

C. Half of their sons and none of their daughters could have DMD.

Explanation:

DMD is a recessive disorder carried on the X chromosome and it is sex-linked. This means that the gene for DMD is located on the X chromosome and it affects mostly males.

If a woman is a carrier of DMD, it means that she has one copy of the mutated gene and one normal copy, and she does not show any symptoms of the disorder.

If a man without the disorder has children with this carrier woman, half of their sons will inherit the mutated X chromosome from the mother. Therefore, they will have the disorder and half of their sons could have DMD.

Since, Females have two X chromosomes, and therefore, if a daughter inherits the mutated X chromosome from the mother, the second X chromosome will be normal which will help in compensating the effects of the mutant one, hence they will be carrier of the disorder but will not show any symptoms. So none of their daughters could have DMD.

So, the outcome is: C. Half of their sons and none of their daughters could have DMD.

Answer 2

Answer:D

Explanation:

I think it is D because only the mother had it and not the father. I don't think the father could get DMD through sex either. So I think that none of their sons and half the daughters could have DMD because they inherited it from the mother.


Related Questions

was a drought for a long period of time, what beak type would become more common in the ground finch population explain

Answers

One would anticipate a shift in the population of ground finches toward smaller, more pointed beaks in the event of a protracted drought.

What is population?

Population is a term used to refer to a group of individuals, typically humans, that inhabit a particular area or territory.

This is due to the likelihood that there will be less food available during a drought, especially small, hard seeds. Because they are more adept at breaking open tiny, difficult seeds, birds with smaller, quite pointed beaks seem to be better able to take advantage of the scarce food sources that are available. They would have an edge over birds with bigger, blunter beaks in terms of survival as a result. Natural selection would then favour birds with smaller beaks over time, increasing the proportion of birds with the this beak type in the population.

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Where in the body do you think cells must divide frequently in adults?

Answers

To be honest everywhere

Answer:

And then, certain regular cells, such as those in hair follicles, hairs, the mouth, the digestive tract, and bone marrow, split rapidly (bone marrow makes blood cells). Chemotherapy may also damage these other forms of quickly dividing cells accidentally, resulting in chemotherapy side effects.

Explanation:

Hope this helps!

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Why is evolution classified as a theory?

Answers

In the same way that Einstein's theory of gravity is referred to as a theory, scientists also discuss evolution as a theory.

A theory is an explanation for how a natural phenomenon functions that has undergone extensive testing through observations and experiments intended to establish the validity of the explanation. In this context, evolution might be considered both reality and a theory. The fact that creatures have altered or evolved over the course of Earth's history is undeniable. Additionally, scientists have looked into the mechanisms that could account for the main patterns of change in biology. Since it provides a comprehensive account of events that have taken place in the natural world, evolution is referred to as a theory.

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Energy from the cell is needed to move substances against a concentration difference.
Compare and Contrast What are the similarities and differences between facilitated
diffusion and active transport by a protein pump?

Answers

Facilitated diffusion and active transport are two processes by which cells can move substances across their membranes. Both processes involve the use of proteins to transport substances, and both require energy from the cell to function. However, there are also some key differences between the two processes:

Similarities:

Both facilitated diffusion and active transport involve the use of proteins to transport substances across a cell membrane.
Both processes require energy from the cell to function.
Differences:

Facilitated diffusion is a passive process, which means that it does not require the cell to use energy to actively pump substances across the membrane. Instead, substances are transported down their concentration gradient, from an area of high concentration to an area of low concentration.
Active transport, on the other hand, is an active process that requires the cell to use energy to pump substances against their concentration gradient, from an area of low concentration to an area of high concentration.
Facilitated diffusion can transport substances in either direction, while active transport can only transport substances in one direction (from low concentration to high concentration).
Facilitated diffusion is limited by the concentration gradient of the substance being transported, while active transport is not. This means that active transport can continue to transport substances even when their concentrations are equal on either side of the membrane.
Active transport is an active process

Drag the fossil fuel (or fuels) on the left to each characteristic described on the right. Terms may be used once, more than once, or not at all.

Answers

Coal, Natural gas and Oil are the following fossil fuels used and their characteristics are described in the following manner.

1. Primarily used for power generation in the United States : coal.

2. Remains of ancient organisms altered below ground by temperature and pressure over long periods of time : coal, oil, natural gas

3. The World's Most Abundant Fossil Fuels : coal

4. Mixtures of hundreds or thousands of different hydrocarbon molecules : oil

5. Major fuels used for heating and hot water in the United States : Natural gas

6. Produced very slowly and considered non-renewable at current extraction rates : coal, oil, natural gas

7. Used primarily in the United States as a source of automotive fuel : oil

8. Lowest carbon dioxide production per unit of energy when burned : Natural gas

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Which of the following features of the alveolar sacs allows for the ease of diffusion of gasses?
a. They are made of a single layer of simple squamous epithelium.
b. Type II alveolar cells secrete surfactant.
c. Elastin fibers allow the alveoli to stretch thin enough for diffusion to occur.
d. They are made of a single layer of simple squamous epithelium and elastin fibers allow the alveoli to stretch thin enough for diffusion to occur.

Answers

The alveoli can stretch thinly enough to allow for diffusion thanks to elastin fibers. The alveolar sacs' unique characteristics make it possible for gases to diffuse easily.

Describe elastin fibers.

Elastic fibers are crucial macromolecules of the extracellular matrix, consisting of an elastin core encircled by a mantle containing fibrillin-rich microfibrils. They give vital characteristics like elasticity and durability to connective tissues including blood vessels, lungs, and skin.

Where can you find elastin fibers?

The both fibrous perichondria comprising hyaline and fiber cartilages as well as the joint fibrous tissue in diverse joints include elastic fibers. Elastic fibers are present in bones' exterior fibrous periosteum layer but not in the inside cellular (cambial) layer.

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The objects in this photo belong to which major sphere of the Earth system?

Answers

i think it’s geosphere??

How can friction help a car?

Answers

Answer:

it helps a car slow down or pull to a stop I think

Friction slows the car down as it moves in the road

For this assignment, you will investigate a timeline of warnings and decisions made during the Hurricane Katrina disaster. Then you will research hurricane forecasting and advanced warning systems and write a brief essay to report your findings

Answers

The timeline of warnings and decisions made during the Hurricane Katrina disaster begins on August 24, 2005 when the National Hurricane Center issued the first advisory on Hurricane Katrina. This advisory marked the beginning of the warning system and the start of the decision-making process. As the storm moved closer to the Gulf Coast, the warnings increased in intensity and the mandatory evacuation orders were issued. On August 29, 2005, the hurricane made landfall, causing widespread destruction and loss of life.

Essay Hurricane Forecasting and Advanced Warning Systems and write a short essay to report your findings.

In the aftermath of the disaster, it became clear that the advanced warning systems and decision-making processes used by government officials were inadequate. The National Hurricane Center had issued warnings and advisories weeks in advance, but these warnings were not heeded or acted upon. As a result, the impact of the storm was much more severe than it could have been.

To prevent similar disasters in the future, advanced warning systems and decision-making processes must be improved. One of the most important advances in hurricane forecasting is the use of satellite data to track storms and predict their paths. This data can be used to issue more accurate warnings and advisories so that the public can be better prepared for a hurricane’s arrival.

In conclusion, the timeline of warnings and decisions made during the Hurricane Katrina disaster reveals the inadequacies of the advanced warning systems and decision-making processes used by government officials. To prevent similar disasters in the future, improvements must be made to both the warning systems and the decision-making processes used by government officials.

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The chemical equation below shows the reaction of glucose and oxygen. Which process does this equation represent?
A. Photosynthesis
B. Anaerobic Respiration
C. Aerobic Respiration
D. Nitrogen Fixation

Answers

It is c for the answer

Please help I don't understand them

Answers

The first reaction in the image is hydrolysis reaction and the second one is condensation reaction.

What is chemical reaction?

The process of changing one group of chemical compounds into another is referred to as a chemical reaction.

A condensation reaction is a kind of chemical reaction in organic chemistry where two molecules join to produce one molecule, typically with the loss of a minor molecule like water.

The process is also referred to as a dehydration synthesis if water is lost during it.

The hydrolysis reaction is the reverse of a condensation reaction and involves two molecules (often H2O) reacting to form two distinct molecules.

Hydrophobic compounds can't dissolve or mix with water. Hydrophobic substances are those that naturally repel water, resulting in the formation of droplets.

Thus, as in the first reaction, water molecule is used to break the bond so it is hydrolysis, as well as the removal of water molecule in second reaction shows condensation reaction.

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How fast do you administer IV epinephrine in NRP?

Answers

It takes as fast as 45–60 seconds to provide the first dose of epinephrine with invasive neonatal resuscitation techniques like intubation or venous access. If the heart rate doesn't rise above 60 beats per minute after the initial dose, epinephrine can be given every 3 to 5 minutes.

Systematic evaluation of human infant and pertinent animal research comparing various epinephrine dosages, delivery methods, and delivery intervals in neonatal resuscitation to the (currently advised) intravenous (IV) administration of doses of 0.01 to 0.03 mg/kg given every 3 to 5 minutes. After being administered, epinephrine immediately starts to work. However, it can take 5–10 minutes for it to take full action. 

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When leaves change colors in the fall which colors of light is reflected and not absorbed?

Answers

pigments that give leaves their red, purple, and blue colors, are produced by the plant in response to certain environmental stressors such as drought, high sunlight, and low temperatures.

When leaves change colors in the fall, the levels of chlorophyll, the pigment that gives leaves their green color, decrease and the chlorophyll breaks down. This causes the green color of leaves to fade, revealing other pigments that have been present in the leaf all along. As the chlorophyll breaks down, other pigments become more visible, reflecting different colors of light. Carotenoids, which are pigments that give leaves their yellow and orange colors, are always present in leaves, but as the chlorophyll breaks down these pigments become more visible and reflected.

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The diagram below shows the ways cells can release energy from food depending on if
oxygen is available.
Using the diagram below, respond to the following:
**Reference that Photosynthesis Summary sheet we first saw in lesson #1 to help
you with this!!
1. Which step(s) takes place if oxygen is available?
2. Which step(s) take place if oxygen is not available?
3. Do we make more ATP when the process is aerobic or anaerobic?
4. Which specific step of aerobic cellular respiration makes the most ATP?
Answer using complete sentences.
Glycolysis
Overview of Cellular Respiration
C6H12O6 +6026CO₂ + 6H₂O + ATP
Oxygen present
Oxygen not present
Krebs cycle
Electron transport chain
Lactic acid fermentation
Alcohol fermentation
1
+

Answers

Glycolysis is the metabolic pathway through which breakdown of complex sugar molecules takes place in the cell with the production of ATP molecules.

What is Glycolysis?

Glycolysis is the process in which glucose molecules (sugar) is partially broken down by the cells in enzyme reactions which do not need oxygen molecules. Glycolysis is the method which the cells use to produce energy in the form of ATP.

If oxygen is available or present, then Krebs cycle takes place and electron transport chain also takes place.

If oxygen is not available or absent in the medium, then in that case, alcohol fermentation and lactic acid fermentation takes place.

More amount of ATP is produced when the process is aerobic in the presence of oxygen. About 32 molecules of ATP (adenosine triphosphate) are produced through glycolysis in the presence of oxygen.

The electron transport chain of the glycolysis pathway makes the most number of molecules of ATP in the cell.

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The basic function of the kidneys is to filter waste products from the blood plasma and secrete them as urine. It accomplishes this via three main processes that occur in a structure known as the nephron. In , plasma filters from the capillaries into Bowman's capsule of the nephron. This is the first step in urine formation. In , excess waste substances not secreted into Bowman's capsule move from the capillary plasma into the tubules. In , substances of value move from the tubules back into the capillary plasma.

Answers

Answer:

this doesn't look like a question

What is the name of those mutations that do not cause harm to the organism

Answers

These mutations are called neutral mutations. Examples include silent point mutations. They are neutral because they do not change the amino acids in the proteins they encode.

Explain why fat-free potato chips fried in artificial fats contain fewer calories than those fried in natural fats.

Answers

Fat-free potato chips fried in artificial fats contain fewer calories than those fried in natural fats because of the less fat content which are present in the product.

What is Artificial fat?

This is referred to as the type of fat which is created in an industrial process that adds hydrogen to liquid vegetable oils to make them more solid.

It also has less amount or percentage of fat which can be converted into calories by the body as fat on its own is also a major source if energy in the body but is usually metabolized slowly unlike carbohydrates which is metabolized faster.

This is therefore the major reason reason why fat-free potato chips fried in artificial fats contain fewer calories than those fried in natural fats thereby making it the correct choice.

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What is a pedigree and how is it read?

Answers

One can identify how a specific trait is passed down via a family using pedigrees. The relationship between parents, children, and siblings determines whether a feature is present or absent in a pedigree.

A pedigree displays the relationships between family members and indicates the family members who have specific genetic pathogenic variants, traits, and diseases, as well as information on their present health. The genealogy of a family may show how diseases are passed down through the generations.

The AKC pedigree is a traditional lineage pedigree, which reads from your dog on the left through subsequent generations branching to the right. It contains a history of your dog's direct ancestors. You can read each successive generation to the right by starting with your dog at the left.

If a trait skips a generation in a pedigree, it is frequently an autosomal recessive trait, according to one tip for spotting recessive traits (although a trait can be autosomal recessive and not skip generations). Both gender share the same prevalence of these traits.

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Cortisol is a hormone that is released to signal which of the following
A stop eating
B tiredness & fatigue
C alertness or stress
D) hunger

Answers

C) alertness or stress

While Joey was working in the lab, he developed what he thinks to be a cure for cancer. He tested the medicine on one cancer patient, and the patient becomes cancer-free within hours. Joey tried to publish his results, but the scientific journal will not accept his article. Why?

Answers

Answer:

The correct answer is - He only tested one subject, so his conclusion is not valid.

Explanation:

In the given question there is an experiment where Joey developed medicine for curing cancer. He tested the medicine on a cancer patient but his results did not publish in the journal as the experiment is not reliable as he tested on a single subject.

The tests or experiments should have performed on different subjects to test the reliability of the results. Single-subject experiments are not trustworthy as there can be other factors or physical condition can help the subject other than medicines.

Isotopes of an element differ in their _________.

Answers

Answer:

neutrons

Explanation:

Describe a situation in which your reaction time is very important. Describe the signal and the reaction to that signal.
(Example: you touch something hot [signal] and your hand pulls away [reaction]).

Answers

Answer:

Driving: when the light is red, you step on the brakes to stop and avoid traffic accidents.

A student sets four bricks in sunlight as shown below which brick will get the hottest?

Answers

Answer: well it's which ever one that was getting the most sun and how much timne you leave each brick out in the sun

Explanation:

pls mark brainiest

List the features of a flower that ensure pollination will take place at some point.

Answers

Answer:

pistil, stigma, stamen, and pollen

Explanation:

9. Why is the cell cycle important?

Answers

Answer:

The cell cycle is the replication and reproduction of cells, whether in eukaryotes or prokaryotes. It is important to organisms in different ways, but overall it allows them to survive. ... Plants require the cell cycle to grow and provide life for every other organism on earth.

pls give me brainless.

Answer:The cell cycle is the replication and reproduction of cells, whether in eukaryotes or prokaryotes. It is important to organisms in different ways, but overall it allows them to survive. ... Plants require the cell cycle to grow and provide life for every other organism on earth.

Explanation:

Full explanation Please

Answers

The relationship between the III-1 and III-2 is husband and wife as it is consanguineous marriage.

What is pedigree analysis?

Pedigree analysis was created to comprehend how genes are passed from parents to their offspring.

It was created as a diagram that can illustrate a family tree, the family members, and their individual genetic characteristics.

Getting married to someone you are closely related to is known as consanguine marriage. Despite the possibility of incest, it indicates more than just incest's intimate component.

Marriage between two relatives who are second cousins or closer is considered a consanguineous union in a clinical sense.

Thus, due to consanguine marriage, they are husband and wife.

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Name structure B in figure 16-1

Answers

I don’t get it? Structure b?

Which living thing is a typical marsh inhabitant? O A. Sea star O B. Octopus O C. Alligator O D. Peat​

Answers

Option C is Correct. Alligator marsh is a kind of wetland where herbaceous plants thrive.

These can be discovered close to the shores of lakes or any other body of water. A marsh is a zone where the aquatic and terrestrial ecosystems meet. Rushes, reeds, and grasses are the predominant flora in wetlands.

Alligators are a type of amphibian that is related to crocodiles. These inhabit freshwater and brackish environments. These amphibians complete their life cycle in environments on land and in water. They favor environments like marshes, lakes, swamps, ponds, and rivers as their home. Alligators may survive in the marsh ecosystem thanks to the muddy terrestrial habitat and freshwater.

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Time Span of the renewability of fuels is a major factor when considering what type of fuel to use in a project. Fossil fuels, including ___,___,and___,require ___ to___ of years to renew. Alternative fuels, including ___,___, and___ power, have a huge advantage since they require between ___ to about one ___ years to renew. Making the ___ fuels the preferred choice for the conversation of natural resources.

Answers

Answer:

Time Span of the renewability of fuels is a major factor when considering what type of fuel to use in a project. Fossil fuels, including oil, coal, and natural gas, require thousands to millions of years to renew. Alternative fuels, including biomass, solar, and wind power, have a huge advantage since they require no time to about one hundred years to renew. Making the alternative fuels the preferred choice for the conservation of natural resources.

Explanation:

I have been able to missing in the gaps with the correct word that is appropriate in the sentence.

Fossil fuels are known to be hydrocarbons which are majorly oil, coal and natural gas. They are formed from the remains of dead animals and plants. The process of fossil fuel formation started millions of years ago. It actually a  longer time to renew. The alternative do not take longer time.

Answer:

Time Span of the renewability of fuels is a major factor when considering what type of fuel to use in a project. Fossil fuels, including oil, coal, and natural gas, require thousands to millions of years to renew. Alternative fuels, including biomass, solar, and wind power, have a huge advantage since they require no time to about one hundred years to renew. Making the alternative fuels the preferred choice for the conservation of natural resources.

Explanation:

What cell types are the cell walls present?

Answers

Answer:

The cell wall is the outer covering of a cell, present adjacent to the cell membrane, which is also called the plasma membrane. As mentioned earlier, the cell wall is present in all plant cells, fungi, bacteria, algae, and some archaea.

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