Question

Identify the correct term for the statement, 'mating between groups do not produce fertile offspring'.

• A. Geographical isolation
• B. Mechanical isolation
• C. Temporal isolation
• D. Hybrid sterility
• E. Behavioral isolation

Answer 1

The correct option is D Hybrid sterility

Presence of populations of a species in distant localities preventing the gene flow between them leads to geographical isolation. Incompatible differences in reproductive structures leading to prevention of cross fertilization refers to as mechanical isolation. Different periods of attainment of sexual maturity leads to temporal isolation. Incompatible premating behaviour leading to no attraction between groups for mating is termed as behavioural isolation. Abnormal distribution to the gametes of whole chromosomes, chromosome segments, or combinations of genes leading to infertile hybrid is one of the post zygotic isolation.

Therefore, the correct answer is option D.