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Mendelian_problems

Mendelian_problems - BLY302 Genetics FALL 2010 PROBLEM...

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PROBLEM SOLVING: MENDELIAN GENETICS 1. In tomatoes, red fruit color is dominant to yellow. Suppose a tomato plant homozygous for red is crossed with one homozygous for yellow. Determine the appearance of: a. the F1 tomatoes b. the F2 tomatoes c. the offspring of a cross of the F1 tomato plants back to the red parent d. the offspring of a cross of the F1 tomato plants back to the yellow parent 2. In maize, a dominant allele A is necessary for seed color, as opposed to colorless ( a ). F2 plants segregate 3:1 colored to colorless. If a colored plant is picked at random and selfed, what is the probability that both colored and colorless plants will be seen among a large number of its progeny? 3. In guinea pigs, rough coat ( R ) is dominant over smoot coat ( r ). A rough-coated guinea pig is bred to a smooth one, giving 8 rough and 7 smooth progeny in the F1 generation. a. What are the genotypes of the parents and their off-spring?
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