Which question can be used to form a hypothesis? a) are ghosts real? b) how smart are old dogs? c) how do planets orbit the sun? d) what affects the growth of corn?

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