In order to find out the different types of gametes produced by a pea plant having the genotype AaBb, it should be crossed to a plant with the genotype:

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aabb. A plant with genotype AaBb can produce four gamete types: AB, Ab, aB, and ab. Crossing it with aabb is a test cross, because the recessive parent contributes only ab, so each offspring genotype/phenotype directly shows which gamete came from AaBb.

In order to find out the different types of gametes produced by a pea plant having the genotype AaBb, it should be crossed to a plant with the genotype:

Solution

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