A. homozygous recessive B. homozygous dominant C. heterozygous 12. Describe the life cycle of a multicelled eukaryote that reproduces sexually. The diploid somatic cells of a mature multicelled organism reproduce by mitosis. The germ line cells produce haploid gametes through meiosis. The gametes of two organisms unite during fertilization, producing a diploid zygote.
Mitosis divides the zygote and daughter cells, forming the cells of the adult.
A gene on the Y chromosome controls the length of hair on men's ears. A woman married to a man with hairy ears has three children. The first two are daughters with hairless ears. The third is a son. All the X-linked alleles a man has came from his mother.