If a calcium atom came near a sulfur atom, the calcium could transfer two of its to the sulfur atom. a. protons b. neutrons c. electrons d. more information is needed to figure this out

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