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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
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B
Heterosis
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C
Splicing
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D
Metamorphosis
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Solution

The correct option is B Heterosis
  • 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.
Thus, the correct answer is option B.

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