Question:
The term "heterosis" was first used by
The term "heterosis" was first used by
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Heterosis is genetically explained by three main hypotheses: the Dominance hypothesis (Davenport), the Overdominance hypothesis (East and Shull), and Epistasis.
Updated On: Jul 13, 2026
- Powers
- Shull
- Davenport
- Keeble and Pellew
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The Correct Option is B
Solution and Explanation
Step 1: Understanding the Concept:
Heterosis, or hybrid vigor, describes the increased strength, size, or rate of growth shown by crossbred plants and animals compared to their parents.
Step 2: Detailed Explanation:
- The geneticist George Harrison Shull first introduced the term "heterosis" in 1914.
- He proposed this term to replace "heterozygosis" and describe the physiological vigor observed in $F_1$ hybrids.
- Shull's work on corn inbred lines and their subsequent crossings laid the foundation for modern commercial hybrid seed production.
Step 3: Final Answer:
The term "heterosis" was coined and first used by G.H. Shull.
Heterosis, or hybrid vigor, describes the increased strength, size, or rate of growth shown by crossbred plants and animals compared to their parents.
Step 2: Detailed Explanation:
- The geneticist George Harrison Shull first introduced the term "heterosis" in 1914.
- He proposed this term to replace "heterozygosis" and describe the physiological vigor observed in $F_1$ hybrids.
- Shull's work on corn inbred lines and their subsequent crossings laid the foundation for modern commercial hybrid seed production.
Step 3: Final Answer:
The term "heterosis" was coined and first used by G.H. Shull.
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