Thank you for your help 5. Genes L, M, and N interact to produce coat color in a

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Thank you for your help

5. Genes L, M, and N interact to produce coat color in a mammal. L is the allele responsible for brown color but the lack of any active allele for L, M, or N means the coat will be white. a) Assuming no linkage, describe the pattern of inheritance. b) What is the ratio of brown to white offspring from a cross of two parents who are heterozygote for all three alleles? c) If M and N were linked and linkage analyses showed them to be 20 cM apart, what will the expected phenotypic ratios be in a test cross of a heterozygote?

Explanation / Answer

The pattern of inheritance is gene interaction. When we cross two parents who are heterozygotes for three alleles, we will get 1:1 ratio of brown to white offspring. The phenotypic ration after test cross will be 1:1.

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