Genetics problemsknight2001 2 dihybrid crosses two

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Unformatted text preview: netics Problems/Knight2001 2 Dihybrid Crosses (Two-traits) 22. A man with a dimple and brown eyes (whose father had blue eyes but no dimples) marries a woman with a dimple and brown eyes (whose father had blue eyes with no dimple). What is the probability their first child will be blue-eyed and without a dimple? (Assume that dimple is a dominant over smooth cheeks, and brown eyes are dominant over blue). 23. A blue-eyed woman with no dimple marries a man with brown eyes and a dimple (whose mother had blue eyes and no dimple). What is the probability that their first child will have blue eyes and a dimple? 24. A man with blue eyes and a dimple (whose mother had blue eyes and no dimple) marries a woman with blue eyes and no dimple. What is the probability that their first child will be blueeyed with no dimple? 25. Assume that a cross was made between fruit flies of genotype AAbb and those of genotype aaBB. Give the Punnett square for the expected F2 progeny types. What proportion of A-B-, Abb, aaB-, and aabb progeny do you expect in the F2? 26. I...
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