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13 November, 04:13

A father possesses an X-linked disorder. What is the chance that his son will inherit this genetic abnormality from the father?

25%

0%

100%

50%

+3
Answers (2)
  1. 13 November, 06:33
    0
    X-linked disorder is a recessive autosomal disorder, which means that

    There is a 1 in 4 chance (25%) of having a child who is unaffected.

    There is a 1 in 4 chance (25%) of having a child who is affected by the condition. These children have two copies of the gene that do not work correctly.

    There is a 1 in 2 chance (50%) of having a child who is a carrier of the condition. These children have one working copy of the gene and one copy of the gene that does not work correctly.
  2. 13 November, 07:46
    0
    Option B

    Explanation:

    A father genotype for male sexuality is X'Y

    Since he possess an X - linked disorder, thus in case if it is crossed with a mother with XX genotype

    Thus, X'Y * XX

    X'X, X'X, XY, XY

    Thus, it is clear that a male child will carry Y chromosomes from his father and X chromosome from her mother. Thus, in order to have X-linked disorder, the male child must receive an affected X allele from his mother.

    Hence, the probability of son inheriting an X-linked disorder from his father would be zero.

    Option B is correct
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