In guinea pigs, the gene for fluffy coat dominates over the gene for smooth coat. What F1 offspring can be expected from a cross between a homozygous curled guinea pig and a smooth guinea pig? What F2 offspring will result from crossing hybrids with each other?
A – swirling hair, dominant feature.
a – smooth coat, recessive trait.
The parents are homozygous.
P AA x aa.
G A A aa.
F1 Aa Aa Aa Aa.
Vortex – 100%, heterozygous.
P Aa x Aa.
G A a A A a.
F 2 AA, Aa, Aa, aa.
By phenotype 3: 1, 3 curled (75%), 25% – smooth-haired.
By genotype 1: 2: 1.
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