A trait on the Y chromosome is passed from fathers to which children?

A trait on the Y chromosome is passed from fathers to which children?

• A. 50% of sons or daughters
• B. 100% of sons and 50% of daughters
• C. 100% of sons and no daughters
• D. 100% of daughters and no sons

Answer: (C)

The trait on the Y chromosome is exclusively passed from fathers to their sons. This is due to the fact that the Y chromosome is one of the two sex chromosomes, with males carrying an X and a Y chromosome (XY) and females carrying two X chromosomes (XX). When a father has a trait on his Y chromosome, he will pass this Y chromosome intact to his sons. Therefore, all sons inherit this Y-linked trait. Daughters, on the other hand, inherit one X chromosome from their father and one X chromosome from their mother, and do not receive the Y chromosome. Consequently, they do not inherit any traits that are located on the Y chromosome. Thus, the correct answer indicates that the trait is passed to 100% of sons and none of the daughters, affirming the unique inheritance pattern associated with Y-linked traits.

The trait on the Y chromosome is exclusively passed from fathers to their sons. This is due to the fact that the Y chromosome is one of the two sex chromosomes, with males carrying an X and a Y chromosome (XY) and females carrying two X chromosomes (XX). When a father has a trait on his Y chromosome, he will pass this Y chromosome intact to his sons. Therefore, all sons inherit this Y-linked trait.

Daughters, on the other hand, inherit one X chromosome from their father and one X chromosome from their mother, and do not receive the Y chromosome. Consequently, they do not inherit any traits that are located on the Y chromosome.

Thus, the correct answer indicates that the trait is passed to 100% of sons and none of the daughters, affirming the unique inheritance pattern associated with Y-linked traits.