Question

For many species, hybrization results in sterile offspring, a process known as reinforcement of isolation. An aiternate way of viewing the preocess of reinforcement is:

a. selection for hybrid individual.

b. selection against individuals that hybridize.

Please help me this problem and explain yout choice. Thank you.

Answer 1

The answer is B. Selection against individuals that hybridize.

When natural selection increases the reproductive isolation it is called as Reinforcement of isolation.

If two populations which have been kept apart for long time are brought into contact, they might show complete reproductive isolation i.e. they will not interbreed. If they show partial or incomplete reproductive isolation then hybrids would be produced.

If the hybrids are sterile then natural selection would act against individuals that hybridize. thus natural seletion would increase or reinforce the reproductive isolation because it is better not o mate and form disadvantageous offsprings.