Assertion :- In co-dominance and incomplete dominance, the
genotypic & phenotypic ratios are same.
Reason :- In case of co-dominance the `F_(1)` generation resembles
both parents.

Options

A. If both Assertion & Reason are True & the Reason is a correct explanation of the Assertion.
B. If both Assertion & Reason are trur but Reason is not a correct explanation of the Assertion.
C. If Assertion is True but the Reason is Flase.
D. If both Assertion & Reason are false.

Answer

**Step-by-Step Text Solution:**

1. **Understanding the Assertion**: The assertion states that in co-dominance and incomplete dominance, the genotypic and phenotypic ratios are the same. To evaluate this, we need to understand what co-dominance and incomplete dominance are.

2. **Co-dominance vs. Incomplete Dominance**:
- **Co-dominance**: In co-dominance, both alleles in a heterozygote are fully expressed, resulting in a phenotype that is a combination of both traits. For example, in a cross between a black (BB) and a white (bb) parent, the offspring (Bb) would display both black and white fur.
- **Incomplete Dominance**: In incomplete dominance, the phenotype of the heterozygote is an intermediate blend of the two parental traits. For example, a red flower (RR) crossed with a white flower (rr) may produce pink flowers (Rr).

3. **Genotypic and Phenotypic Ratios**: In both co-dominance and incomplete dominance, when we perform a monohybrid cross, the genotypic ratio is 1:2:1 (for BB, Bb, bb) and the phenotypic ratio is also 1:2:1 (for the distinct phenotypes). Therefore, the assertion is correct.

4. **Understanding the Reason**: The reason states that in co-dominance, the F1 generation resembles both parents. This is true as the F1 offspring expresses traits from both parents distinctly.

5. **Evaluating the Relationship**: While both the assertion and the reason are true, the reason does not serve as a correct explanation for the assertion. The assertion is about the equality of genotypic and phenotypic ratios, while the reason discusses the expression of traits in co-dominance.

6. **Conclusion**: Since both the assertion and the reason are true, but the reason does not explain the assertion, the correct answer is that both assertion and reason are true, but the reason is not the correct explanation of the assertion.

**Final Answer**: Both assertion and reason are true, but the reason is not the correct explanation of the assertion.

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