Mary's mother has blonde hair and her father has brown hair. mary has a gene for brown hair and a gene for blonde hair. she has brown hair. this indicates that the gene for brown hair is a:

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

Explanation:

Half of each parent is added to the offspring. So, theres a 50% for moms, and a 50% for dad. Therefore, she got one from each parent. Hope this helps and have a wonderful day. :D

answer: 45

explanationyou have to add as well to be it could be

the cladogram shown here shows similarities and differences among several classes of vertebrates. anatomically, the four have limb structure as their common ancestor. we might separate the mammals from the other three classes because they a) divergent; do not lay eggs b) identical; are warm-blooded c) varied; a four chambered heart d) homologous; have mammary glands