Assertion: Progeny of pure line is heterozygous.
Reason: Pure lines are not the progeny of homozygous organisms.

Options

A. If both Assertion and Reason are true and the Reason is the correct explanation of the Assertion.
B. If both Assertion and Reason are true and the Reason is not the correct explanation of the Assertion.
C. If Assertion is true but the Reason is false.
D. If both Assertion and Reason are false.

Answer

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

1. **Understanding the Assertion**: The assertion states that "the progeny of pure line is heterozygous." To analyze this, we need to understand what a pure line is. A pure line is derived from self-pollination of homozygous organisms, meaning they have identical alleles for a particular trait.

2. **Understanding Pure Lines**: Pure lines are created through repeated self-pollination of homozygous plants. This process ensures that the offspring (progeny) will inherit the same alleles from both parents, resulting in homozygous progeny.

3. **Evaluating the Assertion**: Since pure lines are derived from homozygous parents, the progeny of a pure line cannot be heterozygous. Instead, they will be homozygous because they inherit the same alleles from both parents. Therefore, the assertion is false.

4. **Understanding the Reason**: The reason states that "pure lines are not the progeny of homozygous organisms." This statement contradicts the definition of pure lines. Pure lines are indeed the progeny of homozygous organisms since they are formed through self-pollination of these organisms.

5. **Evaluating the Reason**: Since the reason is incorrect (pure lines are indeed derived from homozygous organisms), we conclude that the reason is also false.

6. **Final Conclusion**: Both the assertion and the reason are false. Therefore, the correct answer to the question is that both the assertion and reason are false.

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