Lactose intolerance is inherited through recessive allele. A husband and wife both digest lactose properly. However,...
Lactose intolerance is inherited through recessive allele. A husband and wife both digest lactose properly. However, The wife's mom is lactose intolerant. The husband's dad is also lactose intolerant. What is the probability this couple will have children with a lactose intolerant problem?
Homework Answers
Since, lactose intolerance is inherited through recessive allele it will express only in homozygous recessive condition. Here, the wife's mom and husband's dad are lactose intolerant it means the wifes's mom genotype is (XiXi) and husband's dad genotype is XiY. Therefore wife's genotype will be XiX and Husband's genotype will be XY (since both can digest lactose).
Now the gamete produced by wife are Xi and X and the gamete produced by huaband are X and Y.
Thus, the progeny produced will be XiX, XiY, XX and XY. Thus, if the child is male then there is 50% probability and if the child is female then the probability is 0%.
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