Question

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 ________.

• (A) Transformation
• (B) Heterosis
• (C) Splicing
• (D) Metamorphosis

Answer 1

The Correct Option is B

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).