Biology 203: Final Exam Review 100% Accurate

What cellular events occur in the G1 phase of the cell division cycle? - ANSWER normal growth and cell function What is the best way to describe homologous chromosomes? - ANSWER they carry information for the same traits In some parts of Africa, the frequency of individuals who are heterozygous for the sickle-cell anemia allele is higher than the frequency in North America, presumably because this reduces the frequency of malaria. Such a relationship is related to what? - ANSWER Darwin's theory of natural selection Red-green color blindness is an X-linked recessive trait in humans. Two people with normal color vision have a son with colorblindness. Given this information, the genotypes of the parents are ________________. - ANSWER X^N X^n and X^N Y What investigator was responsible for determining that DNA contains equal amounts of adenine and thymine, and equal amounts of guanine and cytosine? - ANSWER Erwin Chargaff