G6PD deficiency in humans is an X-linked recessive trait. If a homozygous dominant female (XGXG) has children with an affected male (XgY), then what is the probability of the children being carriers?

Respuesta :

Oseni

Answer:

Only the daughters will be carriers and the probability is 1 or 100%

Explanation:

Homozygous dominant female = [tex]X^{G} X^{G}[/tex]

Affected male = [tex]X^{G}Y[/tex]

[tex]X^{G} X^{G}[/tex]   x   [tex]X^{G}Y[/tex]

Offspring = [tex]X^{G}X^{g}[/tex] (female), [tex]X^{G}X^{g}[/tex] (females), [tex]X^{G}Y[/tex] (male), [tex]X^{G}Y[/tex] (male)

For X-linked traits, male gender can either be affected or not affected, they cannot be carriers because the Y chromosome is hypothesized to not carry any gene. Since the two X chromosomes in female carry genes, they can be carriers for X-linked traits.

Considering the female children only, the probability is 1 or 100%.