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Bateson used the terms couping and repul...

Bateson used the terms couping and repulsion for linkage and crossing over .Name the correct paraental or coupling type slong with its cross over or repulsion :

A

Coupling AABB ,aabb,Repulsion AABB,Aabb

B

Coupling AABB,aaBB,Repuslion Aa Bb, aabb

C

Coupling aaBB,aabb,Repulsion AABB,aabb

D

Coupling AABB,aabb,Repulsion Aabb,aaBB.

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To solve the question regarding Bateson's terms of coupling and repulsion in linkage and crossing over, we need to identify the correct parental genotypes for both coupling and repulsion types. ### Step-by-Step Solution: 1. **Understanding Coupling and Repulsion**: - **Coupling**: This occurs when the dominant alleles of two linked genes are found on the same homologous chromosome. For example, if we have two traits A and B, the coupling genotype would be represented as: - Parent 1: AABB (homozygous dominant for both traits) - Parent 2: aabb (homozygous recessive for both traits) - **Repulsion**: This occurs when one chromosome carries a dominant allele for one trait and a recessive allele for another trait. For example: - Parent 1: AaBb (heterozygous for both traits) - Parent 2: aabb (homozygous recessive for both traits) 2. **Identifying the Correct Genotypes**: - For **Coupling**: The genotype should be AABB (dominant for both traits) and aabb (recessive for both traits). - For **Repulsion**: The genotype should be AaBb (heterozygous) and aabb (homozygous recessive). 3. **Analyzing the Options**: - We need to look at the provided options and identify which one correctly represents the coupling and repulsion types as described above. 4. **Conclusion**: - Based on the analysis, the correct pairing for coupling and repulsion is: - **Coupling**: AABB (dominant) with aabb (recessive) - **Repulsion**: AaBb (heterozygous) with aabb (homozygous recessive) ### Final Answer: - **Coupling Type**: AABB (homozygous dominant) and aabb (homozygous recessive) - **Repulsion Type**: AaBb (heterozygous) and aabb (homozygous recessive)
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