Exam 3A%2c 07

Exam 3A%2c 07 - BTNY 210 Exam 3A April 3, 2007 Name_ Lab...

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BTNY 210 Name_______________________ Exam 3A Lab day and time______________ April 3, 2007 1. Meiosis may occur in the following part(s) of plants: a. ovules b. vascular cambium c. apical meristems d. secondary phloem e. only b and c 2. If the 2n (diploid) number of an organism is 14, how many chromosomes will there be in each gamete? a. 5 b. 7 c. 10 d. 12 e. 20 3. The number of chromosomes in daughter cells resulting from meiosis is ____________the number in the original cell. a. one fourth b. half c. the same as d. twice e. none of the above 4. In a dihybrid cross, how many genes can be considered? a. 1 b. 2 c. 3 d. 4 e. the number of genes considered is not related to a dihybid cross 5. In snapdragons flower color is incompletely dominant. If a white colored plant is crossed with a red colored plant, the F 1 generation has: a. all white flowered b. all red flowered c. all purple flowered d. all pink flowered e. half pink and half purple flowered
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6. In meiosis I a. the centromere splits and the chromatids move to opposite poles b. the number of chromosomes is doubled c. the number of chromosomes in halved d. the homologs move to opposite poles e. both c and d are correct 7. If we cross homozygous tall plants with homozygous dwarf plants, all F 1 plants will be heterozygous tall. If the F 1 are self pollinated, the genotypic ratio will be: a. 1:1 b. 2:1 c. 3:1 d. 1:2:1 e. 9:3:3:1 8. What are the genotypes of possible gametes from a parent with a genotype of RrTt (where R is the dominant allele for fruit color and T is the dominant allele for plant height)? a. RrTt
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Exam 3A%2c 07 - BTNY 210 Exam 3A April 3, 2007 Name_ Lab...

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