Danielle has blonde hair. Her mother has blonde hair and her father has brown hair.

Question

Which explains how Danielle inherited her hair color?

She inherited a chromosome that carry alleles for hair color from someone other than her mother and father.
She inherited a chromosome that carries an allele for hair color from only her father.
She inherited a chromosome that carries an allele for hair color from only her mother.
She inherited a chromosome that carries an allele for hair color from each parent.

Answer 1

The correct explanation for how Danielle inherited her hair color is:

She inherited a chromosome that carries an allele for hair color from each parent.

In genetics, hair color is influenced by alleles inherited from both parents. Danielle's mother has blonde hair, which likely means she carries at least one allele for blonde hair, while her father has brown hair, suggesting he carries alleles for brown hair. It's possible that Danielle inherited a blonde allele from her mother and a brown allele from her father. Depending on the specific genetic mechanisms (such as dominance and recessiveness of the alleles), Danielle can express blonde hair even with one blonde allele.