How is it possible for 2 parents that show the dominant trait (brown hair) to have an offspring that shows the recessive trait (blonde hair)?

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

The basic types of tissue in the human body are

What is gene expression control that occurs after the generation of rna