Which of the following statements are true of sex-linked inheritance? (Read carefully and select all of the correct statements.)
A)The Y chromosome has more genes than does the X chromosome, and they are all dominant.
B)A woman with one gene for a sex-linked trait is a carrier of the trait.
C)The dominant gene on the Y chromosome is expressed when the corresponding gene on the X chromosome is missing.
D)The dominant gene on the Y chromosome is expressed when the corresponding gene on the X chromosome is recessive.
E)Men can be carriers only if the gene for the trait on the Y chromosome is recessive
F)A daughter acquires a sex-linked trait from both parents, but a son acquires such a trait only from his mother.

Question

Quizplus · Accepted Answer

B) A woman with one gene for a sex-linked trait is a carrier of the trait. This is true because women have two X chromosomes, so if they have one X chromosome with a recessive allele for a sex-linked trait, they are a carrier for the trait.
F) A daughter acquires a sex-linked trait from both parents, but a son acquires such a trait only from his mother. This is true because sons inherit their X chromosome from their mother and their Y chromosome from their father. Therefore, if the mother carries a recessive allele for a sex-linked trait on one of her X chromosomes, there is a 50% chance that her son will inherit that allele and express the trait. Daughters inherit an X chromosome from both parents, so they can inherit a sex-linked trait from both parents.

Which of the Following Statements Are True of Sex-Linked Inheritance