Question:
Which one of the following is NOT a part of Mendel's Laws of Heredity?
Which one of the following is NOT a part of Mendel's Laws of Heredity?
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Mendel's 3 Laws: 1. Dominance, 2. Segregation (Monohybrid), 3. Independent Assortment (Dihybrid).
Updated On: Sep 4, 2026
- Law of Dominance and Recessiveness
- Law of Quantitative Inheritance
- Law of Segregation
- Law of Independent Assortment
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The Correct Option is B
Solution and Explanation
Step 1: Understanding the Concept:
Mendel's classical principles explain the inheritance of discrete qualitative genes, whereas polygenic quantitative inheritance was formulated later by Nilsson-Ehle and East.
Step 2: Detailed Explanation:
The three classical Mendelian laws of heredity are:
1. Law of Dominance and Recessiveness: In a heterozygote, the dominant allele masks the phenotypic expression of the recessive allele.
2. Law of Segregation (Purity of Gametes): Allele pairs separate during meiosis so each gamete carries only one allele.
3. Law of Independent Assortment: Different gene pairs assort independently during gamete formation.
Quantitative (polygenic) inheritance is a post-Mendelian concept explaining continuous phenotypic variations.
Step 3: Final Answer:
Thus, Law of Quantitative Inheritance is NOT a part of Mendel's original laws, matching option (B).
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