Which of the following statements is true?

a) acquired mutations are passed down from parent to offspring.
b) mutations are the only way to add new genes to a gene pool.
c) hereditary mutations are caused by external factors, such as radiation.
d) only somatic mutations are important to evolution because they can be inherited.

The diagram shows the results when two parents are crossed. the letters represent alleles for a trait that is controlled by three different genes. which best describes this inheritance pattern? multiple allele because a trait is controlled by three different genes polygenic because the offspring have alleles from both parents multiple allele because the offspring have alleles from both parents polygenic because a trait is controlled by three different genes