Question

multiple choice question
how do postzygotic isolating mechanisms prevent successful interspecies hybridization?
members of different species attempt to mate, but are unsuccessful due to anatomical differences.
the egg cannot be fertilized by sperm of another species following a successful mating attempt.
although fertilization is successful, the resulting hybrid is unable to develop or reproduce.
members of different species come into contact, but do not recognize one another as potential mates.

Explanation:

Postzygotic isolating mechanisms act after fertilization. They prevent successful inter - species hybridization by affecting the viability or fertility of the hybrid offspring. The first option describes a pre - zygotic mechanism (mechanical isolation). The second option is also pre - zygotic (gametic isolation). The fourth option is pre - zygotic (behavioral isolation). The third option correctly describes a postzygotic mechanism where the hybrid is unable to develop or reproduce after successful fertilization.

Answer:

C. Although fertilization is successful, the resulting hybrid is unable to develop or reproduce.