Refer to Figure 15.2 to answer the following questions. Figure 15.2 Which of the following two genes are closest on a genetic map of ____ 90. Drosophila? a. and b vg b. and vg cn c. and rb cn and d. cn b e. and b rb D, F, and J are three genes in Drosophila. The recombination frequencies for two of the three genes are shown in Figure 15.3. Figure 15.3 The frequency of crossing over between any two genes will be which of ____ 91. the following? a. Higher if they are recessive Dependent on how many alleles there are b. c. Determined by their relative dominance d. The same as if they were not linked e. Proportional to the distance between them A cell that has 2n + 1 chromosomes is ____ 92. a. trisomic. b. monosomic. c. euploid. polyploid. d. e. triploid. One possible result of chromosomal breakage is for a fragment to join a ____ 93. nonhomologous chromosome. What is this alteration called? a. Deletion b. Disjunction c. Inversion d. Translocation Duplication e. In humans, male-pattern baldness is controlled by an autosomal gene that occurs ____ 94. in two allelic forms. Allele determines nonbaldness, and allele determines pattern Hn Hb baldness. In males, because of the presence of testosterone, allele is dominant over If a Hb Hn. man and woman both with genotype have a son, what is the chance that he will eventually HnHb be bald?
Refer to Figure 15.2 to answer the following questions. Figure 15.2 ____ 90. Which of the following two genes are closest on a genetic map of Drosophila? a. b and vg b. vg and cn c. rb and cn d. cn and b e. b and rb D, F, and J are three genes in Drosophila. The recombination frequencies for two of the three genes are shown in Figure 15.3. Figure 15.3 ____ 91. The frequency of crossing over between any two genes will be which of the following? a. Higher if they are recessive b. Dependent on how many alleles there are c. Determined by their relative dominance d. The same as if they were not linked e. Proportional to the distance between them ____ 92. A cell that has 2n + 1 chromosomes is a. trisomic. b. monosomic. c. euploid. d. polyploid. e. triploid. ____ 93. One possible result of chromosomal breakage is for a fragment to join a nonhomologous chromosome. What is this alteration called? a. Deletion b. Disjunction c. Inversion d. Translocation e. Duplication ____ 94. In humans, male-pattern baldness is controlled by an autosomal gene that occurs in two allelic forms. Allele Hn determines nonbaldness, and allele Hb determines pattern baldness. In males, because of the presence of testosterone, allele Hb is dominant over Hn. If a man and woman both with genotype HnHb have a son, what is the chance that he will eventually be bald?
cell_reproduction_unit_review.docx