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30 Jul 2018

Two parents consult a genetic counselor- you. They do not understand why all of their sons are colorblind (an X-linked trait) but none of their daughters are colorblind. Both of the parents appear normal.

You are their genetic counselor and need to explain to the parents:

Who is the carrier of the colorblindness?

What chromosome is the cause of this?

Why does it occur in sons and not daughters?

Could they have sons that are not color blind?

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Collen VonLv2

30 Jul 2018

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Certain traits such as color-blindness and hemophilia are seen more often in men than in women. Explain why this is true then answer all parts of the problem. Start by showing the genotypes of both parents. Problem: If a man who is not colorblind has children with a woman who is also not colorblind, but whose father was colorblind, what percentage of their children would be expected to be colorblind? What percentage of their daughters would be expected to be colorblind?

bluetortoise746

Hello can someone help me with my case study and critical thinking questions please... appreciate it.

A couple that met at a Cystic Fibrosis Society support group is contemplating having children. They both had brothers who developed cystic fibrosis and they are concerned about the likelihood of having sons who have the disease. As a counselor, you are to answer the following two genetic counseling consult questions in addition to the five critical thinking questions that are listed below.

Genetic Counseling Consult Questions (To Answer)

What is the likelihood that any of their children (sons and/or daughters) will be born with the disorder?

What is the likelihood that any of their children (sons and/or daughters) will be carriers of the disorder?

Critical Thinking Questions (To Answer)

What are the main presenting issues? Include why they may have arisen. (Noteâin this case, you are to assume that they have a child who presents with cystic fibrosis.)

Identify and use at least one website that you used to learn more about the issues and potential solutions; briefly explain what was found at the website(s).

What is (are) the potential disease or disorder? Include (a) a justification for your decision, (b) the causal agent, and (c) the mode of transmission.

What is the recommended treatment for the most likely disease or disorder you identified?

What is the prognosis for the disease or disorder (a) without treatment and (b) with treatment?

greycattle424

2. Dimples are inherited as an autosomal dominant trait. A cleft chin is inherited as an autosomal recessive trait. Red-green colorblindness is inherited as an X-linked recessive trait.

Clem has normal vision, dimples and a non-cleft chin, though his mother had a cleft chin and no dimples. Gwendolyn has no dimples, a cleft chin, and normal vision, though her father was colorblind. Gwendolyn thinks Clemâs dimples are adorable, and Clem is equally fond of Gwendolynâs cleft chin, and both are enamored of the otherâs excellent full-color vision. Obviously, they fall madly in love.

Clem and Gwendolyn immediately plan to have two children and hope that each child will get Clemâs dimples, Gwendolynâs cleft chin, and normal vision. You are their genetic counselor. What are their chances? SHOW YOUR WORK!

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