Respuesta :
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.
Answer:
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
