Gary is trying to think of an object that could model a sunspot. his teacher tells him that such an object might be found right on his face.

which of the following most closely models the behavior of a sunspot?
a.
a freckle
b.
a lip
c.
an eyelash
d.
a birthmark

Punnett squares are used to show possible combinations of alleles or to predict the probability of a trait occurring in offspring. a parakeet that is heterozygous for blue feathers (dominant) is crossed with a parakeet that is homozygous for white feathers (recessive). according to the punnett square for this cross, what percentage of offspring is predicted to have blue feathers? 25 percent 50 percent 75 percent 100 percent