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:[2005]a)AABBb)AaBbc)aabbd)aaBBCorrect answer is option 'C'. Can you explain this answer?

Question

Answer

We should prefer test cross i.e. cross between heterozygous and recessive combination

Answer

To knw the genotype of given plant it is crossed with the recessive parent. This is cld Test cross. Here, C is the recessive one so it's the correct ans.

Answer

To determine the different types of gametes produced by a pea plant with the genotype AaBb, it should be crossed with a plant of the genotype aabb. This is because the plant with the genotype aabb is homozygous recessive for both traits, allowing for the expression of the dominant alleles in the AaBb plant. Let's break down the explanation step by step:

Genotype Analysis:
- The genotype AaBb represents a heterozygous plant for two traits, where 'A' and 'B' are dominant alleles and 'a' and 'b' are recessive alleles.
- This means that the plant has one allele for each trait from each parent.

Explanation:
- When a plant with the genotype AaBb is crossed with a homozygous recessive plant (aabb), the dominant alleles from the AaBb plant will be expressed in the offspring, while the recessive alleles from the aabb plant will not.
- The dominant alleles 'A' and 'B' will determine the phenotype of the offspring, while the recessive alleles 'a' and 'b' will not have any effect.

Gamete Formation:
- During gamete formation, the alleles segregate independently, meaning that each allele for a given trait separates during the formation of gametes.
- In this case, the AaBb plant will produce four types of gametes due to independent assortment: AB, Ab, aB, and ab.

Explanation:
- The dominant allele 'A' can combine with either the dominant allele 'B' or the recessive allele 'b' to form two types of gametes: AB and Ab.
- Similarly, the recessive allele 'a' can combine with either the dominant allele 'B' or the recessive allele 'b' to form two types of gametes: aB and ab.

Conclusion:
- Therefore, the pea plant with the genotype AaBb will produce four different types of gametes: AB, Ab, aB, and ab, when crossed with a plant of the genotype aabb.

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