Why do bats and dolphins have such ranges of hearing?

In a population that is in hardy-weinberg equilibrium, there are two possible alleles for a certain gene, a and a. if the frequency of allele a is 0.4, what fraction of the population is heterozygous? a. 0.40 b. 0.60 c. 0.16 d. 0.48

We all have different forms of genes from our parent(s).what are these different forms called? a.alleles b.characters c.dna d.resources

What is the major difference between a virus and a viroid?