Rachel and Steve both have tightly curled hair. (The hair form gene shows incomplete dominance. There are two alleles, curly and strait. The heterozygote has wavy hair). Rachel has a child with wavy hair. Is it possible for Steve to be the father of this child? Why or why not?

Hair form gene shows incomplete dominance. So if C is responsible for curly hair and c is responsible for straight hair,

CC = Curly

Cc = Wavy

cc = straight

Rachel has curly hair so her genotype is CC. She has a child with wavy hair. Wavy hair is produced by Cc. Since the child got C allele from Rachel, he must have got c allele from the father. So, the father should have at least one c allele. Steve has curly hair so his genotype is CC. Since Steve does not have even one c allele, he can not be the father of Rachel's child.

b - the respond is innate and varies over time.

good luck!

both male and female gametes are produced by meiosis of the germ cells. therefore, both male and female gametes are haploid. one male and one female gamete unite during the fertilization to form the diploid zygote. in seed bearing plants, pollen grain is the male gametophyte, which produces sperm cells.