Question

The term heterosis is coined by

• A. Hull, 1945
• B. Bruce, 1910
• C. East, 1908
• D. Shull, 1914

Hint:

Heterosis means: \[ \mathrm{Hybrid\ Vigour} \] Term coined by: \[ \mathrm{G.\ H.\ Shull\ (1914)} \]

Answer 1

The Correct Option is D

Step 1: Understand heterosis.
Heterosis refers to: \[ \mathrm{Hybrid\ Vigour} \] where hybrid offspring show superior qualities compared to parents.

Step 2: Identify the scientist associated with the term.
The term: \[ \mathrm{Heterosis} \] was coined by: \[ \mathrm{G.\ H.\ Shull} \] in: \[ 1914 \]

Step 3: Analyze the remaining options.
Hull, 1945 Associated with quantitative genetics, not coining heterosis. \[ \Rightarrow \mathrm{Incorrect} \] Bruce, 1910 Worked on hybrid vigour concepts. \[ \Rightarrow \mathrm{Incorrect} \] East, 1908 Contributed to genetics studies. \[ \Rightarrow \mathrm{Incorrect} \]

Step 4: Identify the correct option.
Therefore: \[ \boxed{\mathrm{Shull,\ 1914}} \] Hence, the correct answer is: \[ \boxed{\mathrm{(D)}} \]