In guinea pigs, the allele for rough coat (r) is dominant over the allele for smooth coat (r). a heterozygous guinea pig and a homozygous recessive guinea pig are mated. which would be the phenotypes of the offspring?
a. all rough coat
b. all smooth coat
c. 2 rough coat and 2 smooth coat
d. 3 rough coat and 1 smooth coat

The genotypes of the parents are Rr and rr. The possible genotypes (and their phenotypes) are: RR (rough coat), Rr (rough coat), and rr (smooth coat). In a cross of rough coat boar (RR or Rr) and a soft coat sow (rr), there are half of the offspring with the smooth coat. We know that sow must be rr, but the boar can be RR and Rr. If it was RR, all of the offspring would be Rr and would have the rough coat. So, the boar has genotype RR.

the generally accepted parts of modern cell theory include: all known living things are made up of one or more cells. all living cells arise from pre-existing cells by division. the cell is the fundamental unit of structure and function in all living organisms.