Question

which statement about inheritance is true?

girls get most of their traits from their moms, boys get most of their traits from their dads.
male offspring will always have an x-linked genetic disease if the mom is a carrier.
fathers always determine the gender of the offspring in humans.
males never have y chromosomes.

Explanation:

Analyze the first statement

The statement claims girls get most traits from moms and boys from dads. This is false because autosomal chromosomes are inherited equally from both parents.

Analyze the second statement

The statement claims male offspring always inherit an X-linked disease if the mother is a carrier. This is false because a carrier mother (\(X^D X^d\)) has a 50% chance of passing the affected allele (\(X^d\)) to her son.

Analyze the third and fourth statements

The third statement claims fathers always determine the gender of offspring in humans. This is true because females provide an X chromosome, while males can provide either an X or a Y chromosome. The fourth statement claims males never have Y chromosomes, which is false since human males are XY.

Answer:

• Girls get most of their traits from their moms, boys get most of their traits from their dads.
• Male offspring will always have an X-linked genetic disease if the mom is a carrier.
• Fathers always determine the gender of the offspring in humans. (Correct answer)
• Males never have Y chromosomes.