exam03_key_2008 - BTNY 210 Exam 3A KEY April 2, 2008...

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Exam 3A, Page 1 BTNY 210 Name__________________KEY_ Exam 3A KEY Lab day and time______________ April 2, 2008 1. Meiosis may occur in the following part(s) of plants: a. root tips b. apical meristems c. vascular cambium d. ovules e. none of the above 2. If the 2n (diploid) number of an organism is 12, how many chromosomes will there be in each gamete? a. 12 b. 10 c. 8 d. 6 e. 3 3. Considering just one gene that has two alleles, one dominant and one recessive, if we cross a homozygous dominant individual with a homozygous recessive individual, the genotypes of the first generation (F 1 ) will be: a. half homozygous dominant and half homozygous recessive b. all homozygous dominant c. all homozygous recessive d. all heterozygous e ¾ homozygous dominant and ¼ homozygous recessive 4. Considering the same cross as above, the phenotypes of the F 1 generation should be: a. ¼ dominant b. 1/3 dominant c. ½ dominant d. 2/3 dominant e. all dominant 5. In a dihybrid cross, how many genes can be considered? a. 4 b. 3 c. 2 d. 1 e. the number of genes considered is not related to a dihybid cross 6. In snapdragons flower color is incompletely dominant. If a white colored plant is crossed with a pink colored plant, the F 1 generation has: a. all white flowered b. half pink and half white c. all purple flowered d. all pink flowered e. half pink and half red flowered
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Exam 3A, Page 2 7. 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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This note was uploaded on 02/23/2012 for the course BTNY 210 taught by Professor Staff during the Spring '08 term at Purdue University-West Lafayette.

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exam03_key_2008 - BTNY 210 Exam 3A KEY April 2, 2008...

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