The term heterosis was coined by:
A) Shull
B) East
C) Hull
D) Davenport
The dominance hypothesis of heterosis was first proposed by:
A) East
B) Shull
C) Davenport
D) Hull
The overdominance hypothesis of heterosis was proposed by:
A) Davenport
B) Bruce
C) Keeble and Pellew
D) East and Shull
The term overdominance was coined by:
A) Shull
B) East
C) Bruce
D) Hull
Overdominance hypothesis is also called as:
A) Super dominance
B) Single gene heterosis
C) Stimulation of heterozygosis
D) Cumulative action of divergent alleles
E) All the above
Heterosis can be fixed by:
A) Asexual reproduction
B) Apomixis
C) Polyploidy
D) All of the above
Heterosis results due to:
A) Dominance
B) Over dominance
C) Epistasis
D) All of the above
Heterosis over the best commercial variety is referred to as:
A) Mean heterosis
B) Heterobeltiosis
C) Useful heterosis
D) None of the above
Hybrid progeny from a cross between two inbreds is known as:
A) Single cross hybrid
B) Three way cross hybrid
C) Double cross hybrid
D) Multiple cross hybrid
Highest uniformity is observed in a:
A) Single cross
B) Double cross
C) Three way cross
D) Multiple cross

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