1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
NNADVOKAT [17]
3 years ago
12

Duchenne Muscular Dystrophy (DMD) is an X-linked recessive trait that causes muscular weakness, deterioration of muscle tissue,

and loss of coordination. The allele for DMD is represented by Xd and the normal allele is represented by XD . Neither parent has DMD, but both of their sons express the trait. What are the genotypes of the parents?
Biology
1 answer:
Ronch [10]3 years ago
7 0

Answer:

The correct answer is - XDXd and XD Y

Explanation:

Sex-linked disorders are the disorders that are expressed only when there is two copy of the mutated allele or have not masked by the dominant allele of the gene. In DMD, the dominant allele is XD and the mutated allele is Xd. To express it there are the following genotype possible-

in women XdXd, and in men XdY, so these two genotypes are not possible for the parents in this case. If a mutated allele is present with the dominant allele it will be considered as carrier women but diseased will not be found in them.

So the correct genotype would be

mother: XDXd ( a carrier woman)

father : XDY (normal man)

You might be interested in
2. Explain how the Coriolis effect affects wind flow.
meriva

Answer:

The Coriolis Effect contributes to the circular motion of the wind around pressure systems which move weather patterns in the southeastern United States. The Earth rotates at a high speed counter-clockwise as viewed from the North Pole. The Coriolis Effect does not impact the wind speed, only the wind direction.

Explanation:

5 0
3 years ago
Read 2 more answers
A Ligustrum plant cell is exposed to an aqueous solution having sodium and chloride concentrations higher than the sodium and ch
e-lub [12.9K]
What following ? actually the cell will gain more water by diffusion and will let more sodium chloride ions in because they will move from high concentration to low concentration
6 0
3 years ago
Read 2 more answers
A factor that does not change in an experiment is the
Vinil7 [7]
A, because it the constant variable
6 0
2 years ago
1. If the ability to taste PTC were controlled by only two alleles: one dominant (T) and one recessive (t), would there be any w
maw [93]

Answer:No

Explanation: there would not be a way to distinguish between Tt and TT without mating or DNA analysis because T is dominant in Tt, therefore has the same physical characteristics as TT.

8 0
3 years ago
What does it mean to maintain a stable internal environment?
Anna11 [10]

Answer: It means to guide and regulate chemical and physical parameters to keep your body or environment in a constate state for proper functioning.

Explanation: This is called homeostasis. The body has systems in place to monitor its components such as cells, organs and any other molecule needed to maintain life and good health. The body needs to maintain its temperature at 37°C, pH of blood at 7.4, water balance, osmotic pressure, growth rate and tissue repairs whenever it dictates the need, danger of infection or injury.

All of these form an integral part of a healthy living organism and it needs to always be stable, regulated and monitored. This is called maintaining homeostasis.

8 0
3 years ago
Other questions:
  • In which of these examples does chemical energy change to electrical energy?
    12·2 answers
  • Because of their ability to undergo _____, viruses can rapidly evolve. protein synthesis serious infections frequent mutations D
    13·2 answers
  • Angiotensin ii acts on the kidney to retain more sodium. <br> a. True <br> b. False
    14·1 answer
  • Can someone please help me
    7·2 answers
  • Why is pyruvate imported from the cytoplasm into the mitochondrial matrix?
    9·1 answer
  • What describes the activities of a cell that include cellular growth and cell division?
    6·1 answer
  • Which of the following describes a feedback mechanism
    13·1 answer
  • How does fertilization produce new offspring?
    7·1 answer
  • How biomass converted into energy?
    6·1 answer
  • Explain the rock cycle in 10 sentences
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!