The thermosphere is the hottest layer in the atmosphere because it is the closest to the sun air molecules generate heat greenhouse gases absorb cold the ozone layer reflects the suns heat

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