Which of the following explains how a child might have blue eyes? A The child received one set of genes for blue eyes from their mother.

B The gene for eye color changes depending on the environment.

C The child received the genes for blue eyes from both of the parents.

D The gene for blue eyes is always dominant over all other eye colors.

During crossing-over, a. genetic material is exchanged between nonsister chromatids, resulting in new combinations of alleles. b. nonsister chromatids from each homologous chromosome of a tetrad are exchanged, resulting in new combinations of alleles. c. one homologous chromosome of a tetrad is exchanged with another tetrad, resulting in new combinations of alleles. d. sister chromatids from each homologous chromosome of a tetrad are exchanged, resulting in new combinations of alleles. e. genetic material is exchanged between sister chromatids, resulting in new combinations of alleles.