Ocular albinism is an X-linked recessive trait that causes a lack of pigmentation in the eyes.
A father with ocular albinism and mother without the trait have a daughter.
What is the percent chance that the daughter will have ocular albinism?
Choose 1 answer:
Choose 1 answer:
(Choice A)
0
%
0%0, percent
A
0
%
0%0, percent
(Choice B)
25
%
25%25, percent
B
25
%
25%25, percent
(Choice C)
50
%
50%50, percent
C
50
%
50%50, percent
(Choice D)
100
%
100%100, percent
D
100
%
100%
The answer is (Choice A) 0%. Since ocular albinism is an X-linked recessive trait, it is only carried on the X chromosome. The father with ocular albinism can only pass on his X chromosome to his daughter since he does not have a Y chromosome. However, the mother does not carry the trait and can only pass on her X chromosome to her daughter. Since the daughter receives one X chromosome from each parent, and the mother does not carry the trait, the daughter does not have a chance of inheriting ocular albinism.
The correct answer is:
(Choice A) 0%
Since ocular albinism is an X-linked recessive trait, it is passed on through the X chromosome. The father with ocular albinism can only pass on the affected X chromosome to his daughters, as they receive their X chromosome from their father. However, since the mother does not have the trait, she can only pass on her normal X chromosome to her daughters. This means that the daughters will receive one normal X chromosome from their mother and one affected X chromosome from their father. However, since ocular albinism is a recessive trait, the daughter would need to inherit two affected X chromosomes (one from each parent) in order to have the trait. Therefore, the daughter will not have ocular albinism.