How are birds and reptiles similar?
a. they both have scales and lay eggs.
b. they both have scales and have babies born alive.
c. they both have scales and migrate.
d. they both have scales and hibernate.

Guinea pig coat color is determined by a single gene. the allele for black coat color is dominant to brown. in a cross between twoblack-haired guinea pigs, 20 offspring are born. if both parents were heterozygous, probability would predict that approximately howmany of the 20 offspring would have brown hair?