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Q.

A hybrid formed by two species is not viable. What is the nature of the reproductive barrier?

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a

Prezygotic barriers

b

Postzygotic barriers

c

Allopatric barriers

d

Sympatric barriers

answer is B.

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Detailed Solution

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  • The creation of hybrids that are sterile and unable to reproduce, as well as the creation of hybrids that do not survive past the embryonic stage, are examples of postzygotic barriers (hybrid inviability or hybrid sterility).
  • One kind of postzygotic barrier is low hybrid viability. In this setting, hybrid offspring are born, but due to their lower fitness, they have a lower chance of reaching sexual maturity. Another example is hybrid sterility, where the offspring of a hybrid are healthy but sterile.
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