Nthe quest to understand the basis of infertility in humans, researchers have identified a mutation in a gene associated with chiasmata. this protein normally acts to promote homologous recombination. why might a defect in homologous recombination have consequences for fertility?

The embryos of a bird, a reptile, and a mammal are similar in appearance. how does comparing the physical appearance of embryos of different species support the theory of evolution? a. it shows that these organisms share a common ancestor. b. it provides evidence that these organisms eat the same foods.c. it shows that these organisms share the same habitat.d. it provides evidence that these organisms suffered a genetic mutation.