Sex-Linked Punnett Squares

Sex-Linked Punnett Squares - SEX-LINKED PUNNETT SQUARE...

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S EX -L INKED P UNNETT S QUARE P ROBLEMS 1. A boy, whose parents and grandparents had normal vision, is color-blind. What are the genotypes for his mother and his maternal grandparents. Use X B for the dominant normal condition and X b for the recessive, color-blind phenotype. 2. The bison herd on Konza Prairie has begun to show a genetic defect. Some of the males have a condition known as "rabbit hock" in which the knee of the back leg is malformed slightly. We do not yet know the genes controlling this trait but for the sake of our question, we shall assume it is a sex-linked gene and that it is recessive. Now, suppose that the herd bull (the dominant one which does most of the breeding) who is normal (X N ) mates with a cow that is a carrier for rabbit hock. What are his chances of producing a normal son? If he mates with this cow every year, what percentage of their daughters have normal knees? What percentage of their daughters will be carriers of rabbit hock?
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This note was uploaded on 04/05/2011 for the course BIOL 2112 taught by Professor Deidra during the Spring '11 term at CSU Sacramento.

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Sex-Linked Punnett Squares - SEX-LINKED PUNNETT SQUARE...

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