What is the 2n chromosome number for a normal human karyotype?

Which of the following is caused by reproductive isolation within a species? a. a decrease in gene flow b. an increase in genetic flow c. a decrease in genetic drift d. an increase in gene flow

The backbone of the double helix has an alternating molecules. what do you call these alternating molecule?

Which if the items below would describe the genotype of an individual? a.green eyes b.hair color c.gg d.g1