Problem set 4ans

Problem set 4ans - Practice Problem Worksheet 4 1. In a...

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Practice Problem Worksheet 4 1. In a series of two-point map crosses involving three genes linked on chromosome 3 in Drosophila, the following distances were calculated. cd-sr 13 m.u. cd-ro 16 m.u. (a) Determine the sequence and construct a map of these three genes. Can not determine sequence. May be cd – sr – ro, or sr – cd - ro (b) What mapping data will resolve the problem with (a)? Distance between ro and sr (c) Can we tell which of the sequences shown below is correct? No, there are not sequences shown below ;-) 2. In rabbits, black (B) is dominant to brown (b), while full color (C) is dominant to chinchilla (c ch ). The genes controlling these traits are linked. Rabbits that are heterozygous for both traits and express black, full color were crossed to rabbits that express brown, chinchilla, with the following results: 31 brown, chinchilla 35 black, full color 16 brown, full color 19 black, chinchilla Determine the arrangement of alleles in the heterozygous parents and the map distance
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Problem set 4ans - Practice Problem Worksheet 4 1. In a...

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