Inviable

... near the inversion b)inversions in the male inhibit fertilization of non inversion containing females. C)inversions heterozygotes usually yield inviable gametes or zygotes when crossing over occurs within the inversion. E)inversion heterozygotes produce a greater number of recombinant offspring. ...

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When it does cause problems like what I think your speaking about the possibility of birth of the fetus with the traits gained by crossing over is inviable. Thats why no matter what some traits will never be shown because the fetus cannot be born.

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