Midterm I - BIOL 340 MIDTERM I October 22, 2009 = 175...

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BIOL 340 – MIDTERM I October 22, 2009 = 175 points Page 1 of 4 Write only answers on lines provided. Anything else on lines will result in deducted points . PRINT YOUR NAME: KEY 1. How many Barr bodies are found in the specific cell of human indicated in each part below? (20 points) a. Somatic cell of an XXY individual? ONE b. Gametic cell of a normal female? ZERO c. Somatic cell of an XO individual? ZERO d. Somatic cell of an XXYY individual? ONE e. Somatic cell of an XYY individual? ZERO 2. In wheat plants, flat seeds ( F ) are completely dominant to puffy seeds ( f ). Long stems ( L ) are completely dominant to short stems ( l ). Terminal flower position ( T ) is completely dominant to axial flower position ( t ). Red flowers ( R 1 ) show incomplete dominance when crossed to white flowers ( R 2 ), producing pink flowers in their offspring. All 4 gene loci assort independently of each other. Parent 1 has flat seeds, long stems, terminal flower position, and pink flowers. Parent 2 has flat seeds, long stems, axial flower position, and pink flowers. Parent 1 is crossed to parent 2, and some of their offspring have puffy seeds, short stems, axial flower position, and red flowers. (30 points) a. 16 How many different gametes can parent 1 produce in respect to these 4 gene loci? b. 8 How many different gametes can parent 2 produce in respect to these 4 gene loci? c. 54 How many different genotypes can occur in the offspring of these two parents? d. 24 How many different phenotypes can occur in the offspring of these two parents? e. 1/64 What is the probability of the cross producing offspring with genotype FF ll tt R 1 R 2 ? f.
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This note was uploaded on 03/06/2011 for the course BIOL 340 taught by Professor Margaretjefferson during the Fall '09 term at California State University Los Angeles .

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Midterm I - BIOL 340 MIDTERM I October 22, 2009 = 175...

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