Please give the accurate number for the answer, thank you! A man and a woman get
ID: 99983 • Letter: P
Question
Please give the accurate number for the answer, thank you!
A man and a woman get married and for both of them it is their second marriage. The man can see both red and green although in his first marriage he had a son who could not. The man also suffers from hemophilia. The woman can see both red and green colors but her father cannot. She does not have hemophilia but in her previous marriage she had a son with the disease. Both hemophilia and red-green color blindness are recessive sex-linked traits. For any children that are born during the woman's second marriage, what is the probability that they will be: a. a daughter with hemophilia? _________ b. a son with hemophilia? ___________ c. a daughter who is a carrier red-green color blindness? ______ d. a son with red-green color blindness? ______ e. a son with both red-green color blindness and hemophilia? ______Explanation / Answer
Red-green color blindness is transmitted in X linked recessive pattern. Males are either affected or will be normal because they contain only one X chromosome in their genome. Females will be carriers if one of their X chromosome is affected.
Here, the man is normal for color vision (XY) but is affected by haemophilia (xY). The female is a carrier for both color blindness (Xx) and haemophilia (Xx).
The inheritance of color blindness between male (XY) and female (Xx) is given below,
Among females, half are normal and half are carriers for color blindness. Among males, half are normal and half are affected by color blindness.
The inheritance of haemophilia between males (xY) and females (Xx) is given below,
Among females, half are carriers and half are affected by haemophilia. Among males, half are normal and half are affected by haemophilia.
a) Daughter with haemophilia - 0.5
b) Son with haemophilia - 0.5
c) Daughter who is a carrier for color blindness - 0.5
d) Son with red-green color blindness - 0.5
e) Son with both red-green color blindness and haemophilia - 0.25
X Y X XX XY x Xx xY