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Q.

If two species form a hybrid that is not viable. What kind of reproductive barrier is it?

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a

Prezygotic barriers

b

Postzygotic barriers

c

Sympatric barriers

d

Allopatric barriers

answer is B.

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Detailed Solution

  • Postzygotic obstacles include the production of hybrids that are sterile and incapable of procreating, as well as the production of hybrids that do not survive past the embryonic stage (hybrid inviability) ( hybrid sterility ).
  • Low hybrid viability is one type of postzygotic barrier. In this environment, hybrid offspring are born, but because of their decreased fitness, they are less likely to mature sexually. Another illustration is hybrid sterility, in which hybrid offspring are healthy but sterile.
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