Your question is a bit confusing but I think I got it
I am crossing a heterozygous black male with a heterozygous black female
where black is dominant to white
The genotype ratio would be 1:1:2 with 1 homozygous dominant pig 1 homozygous recessive pig and 2 heterozygous pigs
The phenotype ratio would be 3:1 with three black pigs and one white pig
Answer:
True
Explanation:
A force is a push or pull against something or someone
Evolution over millions of years, This could happen due to selection pressures like predators, change in environments for example the industrial revolution and how black moths were more in favor than white moths because the could blend in with the soot, natural selection also can cause this as well as bottleneck effect and genetic drift.