Question

which statement about inheritance is true?
girls get most of their traits from their moms; oys 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:

• First option: Traits are inherited from both parents, not gender - specific majorly from one.
• Second option: For X - linked recessive, a carrier mom (X^A X^a) has a 50% chance to pass the allele to sons; for dominant, sons with the allele get it. So "always" is wrong.
• Third option: Fathers give X (for daughter) or Y (for son). So father's sex chromosome (Y or X) determines offspring's gender (XX - female, XY - male).
• Fourth option: Males have XY chromosomes, so they do have Y chromosomes.

Answer:

C. Fathers always determine the gender of the offspring in humans.