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:

• Girls get most of their traits from their moms; boys get most of their traits from their dads: This is incorrect. Offspring (both boys and girls) inherit half of their genetic material (traits) from each parent.
• Male offspring will always have an X - linked genetic disease if the mom is a carrier: This is incorrect. If the mom is a carrier (\(X^{A}X^{a}\)) and the dad has a normal \(X\) chromosome (\(X^{A}Y\)), there is a 50% chance for male offspring (\(X^{A}Y\) or \(X^{a}Y\)) to have the X - linked disease.
• Fathers always determine the gender of the offspring in humans: This is correct. Females have \(XX\) chromosomes and can only contribute an \(X\) chromosome. Males have \(XY\) chromosomes. If the sperm contributes an \(X\) chromosome, the offspring is female (\(XX\)); if it contributes a \(Y\) chromosome, the offspring is male (\(XY\)).
• Males never have Y chromosomes: This is incorrect. Males have \(XY\) chromosomes.

Answer:

Fathers always determine the gender of the offspring in humans.