So I'm having a bit of a brain fart on some extra credit work for genetics. I could ask the professor but she's not too nice and I already fought about horse colors with her before and she doesn't like me
It's with population genetics. To sum it up a fictitious herd of horses was abandoned to breed amongst themselves completely isolated. Original herd has one palomino paint stallion, one sorrel stallion, four sorrel mares, one palomino mare, and one sorrel paint mare. The herd has grown to 90 since then.
I'm going to assume
"paint" means just tobiano...as that's the only white patterned mentioned anywhere on the paper. *sigh*
Obviously there's ee, CCcr, CC, TO?, and toto in the gene pool.
First question is saying in the modern herd, 11 out 90 horses are cremello. Assuming the herd is in Hardy-Weinberg equilibrium, what are the frequencies of the C and Ccr alleles?
Hardy-Weinberg equation is p^2 x 2pq x q^2
I know how to figure that out but she usually gives us the number of recessive
(or in this case the chestnuts). And normally we figure out all three and not just two...
Plus she's always given us examples where both homozygous dominant and heterozygous are the same colors and this is not the case with the cream gene.
If I calculated it right so far I have the frequency of cremellos at .34 and but I don't know how to figure out how many palominos and chestnuts are in the remaining 79.