John and pat are identical twins with identical dna. john works in a movie theater, and pat works as a lifeguard. they have very different skin pigmentation. which is the best explanation of the difference?
skin color, a polygenic trait, is also determined by environmental factors.
skin color, a polygenic trait, is also determined by the sex of the individual.
skin color, a trait that demonstrates incomplete dominance, is also determined by environmental factors.
skin color, a trait that demonstrates incomplete dominance, is also determined by the sex of the individual.

Kara has a plant that produces either purple or white flowers. she crosses a plant that has two recessive alleles for white flowers with a plant that has two dominant alleles for purple flowers. which result would be true of all of the offspring? a) all of the offspring would have two recessive alleles and white flowers. b) all of the offspring would have two dominant alleles and purple flowers. c) all of the offspring would have one recessive allele, one dominant allele, and white flowers. d) all of the offspring would have one recessive allele, one dominant allele, and purple flowers