Polydactylism occurs . a. only in cats
b. only in humans
c. in less than one in 1000 children
d. more commonly in certain populations, such as the Amish.

Which of the following occurs most often in a population when genetic variation and overproduction are present? some organisms have a lower reproductive success than others. some organisms have a higher reproductive success than others. some organisms have no reproductive success. some organisms do not have genetic variation.

Which best explains why there are 64 possible codons in the genetic code and only 20 amino acids that make protiens of living organisms on earth

Cells destroy body cells infected by a virus or bacteria. killer t t memory t none of the above