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Solutions For An Introduction to Genetic Analysis Chapter 3 Problem 18P

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Solution 1

Mitosis is a process where the parent cell duplicates and divides into two daughter cells. The absence of cross-over in mitosis causes the absence of variation. When normal mitosis takes place in a cell of the genotype A/a; B/b; C/c, the possible daughter cells will have the same genotype as the parent mother cell.

Picture 1

When such a cell which has all its genes on separate chromosome pairs, divides mitotically, the genotypes of the daughter cells will be identical to the genotype of the parent cell.

The process of mitosis does not change the genotype of the offspring but only duplicates the genotype of the parent while meiosis changes the genotype of the offspring. Hence cells formed by the fusion of two gametes will show variation in genotype.

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