A population of poison ivy that lives in the forest behind LHS has their leaf thickness coded for by a single gene with two alleles. A dominant THICK (H) allele and a recessive thin (h) allele. 250 are homozygous for the THICK allele (HH) , 500 are heterozygous (Hh) and 250 are homozygous for the thin allele (hh) What is the frequency of dominant alleles?
