Copy of Punnett Square Practice Problems.docx

# Copy of Punnett Square Practice Problems.docx - Punnett...

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Punnett Square Practice Problems 1. In dogs, black fur (F) is dominant to white fur (f). If one parent has black fur (FF) and the other parent has white fur (ff), what are the chances their offspring will have black fur? (use a Punnett square to justify your answer and show your work below and highlight your answer in yellow.) a. Each offspring will have a 0% chance to have black fur. b. Each offspring will have a 50% chance to have black fur. c. Each offspring will have a 75% chance to have black fur. d. Each offspring will have a 100% chance to have black fur. F F f Ff Ff f Ff Ff 2. A. In the cross you did for problem #1, is the phenotypic ratio different than the genotypic ratio you found? B. Why or why not? A. No B. Because the genotypic ratio perfectly represents the phenotypic ratio. 3. What would happen if one of the offspring from question #1 were crossed with another dog heterozygous for fur color? (use a Punnett square to justify your answer and show your work below and highlight your answer in yellow.) a. 50% puppies will be heterozygous.
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