Carla has brown hair, and her husband also has brown hair. However, Carla's son is born with blond hair. This most likely indicates that Carla's son

Question

Quizplus · Accepted Answer

The inheritance of hair color is dependent on multiple genes, but it is generally accepted that the gene for blond hair is recessive to the gene for brown hair. If both Carla and her husband have brown hair, they can either both be heterozygous (carrying one dominant and one recessive gene for hair color) or homozygous dominant (carrying two dominant genes). In either case, the son would have to inherit a recessive gene from each parent to exhibit blond hair. Therefore, the most likely scenario is that Carla's son inherited the recessive genes for blond hair.

Carla Has Brown Hair, and Her Husband Also Has Brown