Task

In a cattle herd, polled (A) is completely dominant over horned (a). In a herd of 2500, horned animals make up 16 %; treat the herd as a randomly mating population. 1) State the Hardy–Weinberg law and the method for finding allele and genotype frequencies. 2) Find the frequencies of alleles a and A. 3) Calculate the numbers of homozygous polled, heterozygous and horned animals. For each part, write out the law or method used (cross scheme, formulas, reasoning) and all calculations step by step.