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PS1AH[1]

# PS1AH[1] - Bios 101 Problem Set 1 These questions are due...

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Bios 101, Problem Set 1 These questions are due in discussion. Please type or print neatly on separate sheets of paper. It is imperative that no portion of your answers be copied directly from another student or from an online source. 1. (1 point) A man with red-green color blindness marries a woman with normal vision. Their first child, a boy, has normal vision. i) Diagram the cross. The couple has a second child, a girl, with normal vision. This girl grows up and becomes pregnant with a child she knows to be a boy. The father of this child has normal vision. ii) Diagram the cross. iii) What is the probability that this child will have red-green color blindness? 2. (3 points) A snapdragon from a true-breeding line with white flowers and small leaves (line A) is crossed to a snapdragon from a true-breeding line with red flowers and large leaves (line B). The resulting offspring, the F1, are all pink- flowered, with medium-sized leaves. Based on this information alone, is it NOT possible to determine how many loci are involved in this cross. Suppose an individual from the F1 is crossed to an individual from line A. The resulting offspring are as follows: 50% white flowers and small leaves, 50% pink flowers and medium leaves. i. What does the term pleiotropy mean? (This is a hint!) ii. What type of allelic interaction is shown by this cross?

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