When two unrelated individuals or lines are crossed, the performance of F1 hybrid in often superior to both of its parents. This phenomenon is called ________.

Question

cdquestions Admin · Accepted Answer

Explanation: Heterosis refers to the phenomenon that progeny of diverse varieties of a species or crosses between species shows the increase in growth, size, fecundity, function, yield or other characters in hybrids over those of the parents. Various models have been posited to explain heterosis, including dominance, overdominance, and pseudo-overdominance. Hence, the correct option is (B).

Answer

(A) Transformation

Answer

(B) Heterosis

Answer

(C) Splicing

Answer

(D) Metamorphosis

List I		List II
A	The structures used for storing of food.	I	Gizzard
B	Ring of 6-8 blind tubules at junction of foregut and midgut.	II	Gastric Cacca
C	Ring of 100-150 yellow coloured thin filaments at junction of midgut and hindgut.	III	Malpighian tubules
D	The structures used For grinding the food.	IV	Crop

When two unrelated individuals or lines are crossed, the performance of F1 hybrid in often superior to both of its parents. This phenomenon is called ________.

The Correct Option is B

Solution and Explanation

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