What did Darwin’s studies of Vestigial Organs and Atavisms tell him about the process of evolution? Question 5 options: The appearance of such structures indicates that mutations have a strong impact on our evolution. Mutants are real and not just a product of science fiction writing. Atavisms and vestigial organs did not strongly contribute to his understanding of evolution via natural selection. Humans share a deep evolutionary ancestry with other animals that can be seen in reappearing atavisms or body parts that no longer seem to have a function.

Several genes that influence the size of the Drosophila wing were investigated to try to determine their genetic relationship, including Yorkie (yki), warts (was), fat (ft) and dachs (d). The wild-type allele of each gene is dominant and obviously is required to regulate growth to get a normal-sized wing. Homozygous mutants in these genes have either a larger wing or a smaller wing than wild-type. Genotype (homozygous mutant for one or more genes, all other genes are wild-type) Size of wing yki yki wts wts ft ft small large large small small small large small yki yki; wts was yki yki; ftt wts wts; dd ft ft, d d Below are four possible genetic pathways, identify the one consistent with the data in the table. (4 points total) Yki Wts Ft Wts Wts Yki Wts Yki Ft Ft Yki wing growth wing growth growth

After reviewing the timing of puberty information, explain three factors that influence the timing of puberty.