Which headline would be an example of genetic engineering?

plz put in the true answer

a) mrs. o'hara gives birth to the fourth redhead.
b) mr. brown's pigs: best quality ham for the money.
c) gene added to liver improves clotting time.
d) bacteria make human insulin

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