1 ISB 202 Fall 2009 Diagnostic Quiz II (Total Points 20 pts) Read each question carefully. Choose the best answer. Think a lot before making your choice! Please use the Bubble Sheet for all answers. Please hand in both the questions and scantron when time is called. You will have 20 minutes. 1. Genes, traits (2pts) Which of the following is a trait? a. An allele b. Aa c. Heterozygous d. The song a male American robin sings to attract a mate (i.e., a courtship song) 2. Genes, traits (2pts) Which of the following is a phenotype? a. Hair color b. Red hair c. bb d. b 3. Chromosomes and Mitosis (2pts) How many chromosomes are in each daughter cell after mitotic division? a. the same as the parent cell b. half the number as the parent cell c. double the number as the parent cell d. triple the number as the parent cell 4. Chromosomes and Meiosis (2 pts) How many chromosomes are in each gamete after meiotic division? a. the same as the parent cell b. half the number as the parent cell c. double the number as the parent cell d. triple the number as the parent cell 5. Which of the following is (are) NOT true for DNA, the genetic code? a. The code itself must be variable in order to code for different alleles. b. Mutations in DNA replication generated during mitosis are passed from the original parent cell to daughter cells. c. Mutations in DNA replication generated during mitosis are passed from parents to offspring. d. Mutations in DNA replication during meiosis generate variability in DNA, which lead to variability in phenotypes. e. None of the above. 6. DNA, variability, and inheritance (2pts) There is genetic diversity all around us. For example, look at all the genetic diversity we see (via phenotypic diversity) in our class. Then think about all the different kinds of dogs, tomatoes, and apples. How is this genetic diversity generated? a. Mutations in the DNA generated during DNA replication b. When the homologous chromosomes pair up during meiosis, they can exchange pieces of homologous DNA c. Reshuffling of chromosomes during meiosis d. All of the above2 The following questions are about the process of meiosis and the formation of gametes. They were taken from an on-line genetics problems website (http://www.ksu.edu/biology/pob/genetics/intro.htm). For questions 7-10, use the following information: Kelp, a large, multicellular type of algae, has air bladders in the leaf blades to help them float near the surface of the ocean where they can get more sunlight. Assume that having many air bladders (M) is a dominant trait. Figure. From left to right: (left) a cartoon of an undersea kelp forest community; (center) a anatomic diagram of a generic kelp plant; and (right), a close-up of a kelp frond, where you can see the gas (air) bladders. 7. Determine the genotype of a heterozygous individual. If M represents the dominant allele, which of the following would represent an individual heterozygous for the number of air bladders? (2 pts) a. MM b. Mm c. mm d. mM 8. Which of the images below show the homologous chromosomes for this individual as they would appear just before meiosis? (2 pts) 9. What gametes would be produced by a heterozygous individual? (2 pts) a. 100% Mm b. 100% M c. 50% M and 50% m d. 100% m 10. What gametes would be produced by a homozygous recessive individual? (2 pts) a. 100% Mm b. 100% M c. 50% M and 50% m d. 100%
View Full Document