Answer :
Differences in the sizes and shapes of genitalia can prevent members of different species of crickets from mating. This is a type of prezygotic isolating mechanism known as mechanical isolation.
The biological attributes of organisms which check interbreeding are known as reproductive isolating mechanisms (RIMs).
There are two broad categorizations of reproductive isolating mechanisms i.e. prezygotic (those which take effect prior to fertilization) as well as postzygotic (those which take effect later).
Prezygotic RIMs prohibit the creation of hybrids among members of dissimilar populations by means of ecological, temporal, ethological or behavioral, mechanical isolation as well as gametic isolation.
Postzygotic RIMs decrease the viability or fertility of hybrids or the resulting offspring from them.
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