Question

Assertion :In case of incomplete linkage, linked gene show new combination along with parental combination. Reason: In case of incomplete linkage, linked genes are separated by crossing over.

• A. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
• B. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
• C. Assertion is correct but Reason is incorrect
• D. Both Assertion and Reason are incorrect

Answer 1

The correct option is A Both Assertion and Reason are correct and Reason is the correct explanation for Assertion

Crossing over is the process of exchange of genetic material between non-sister chromatids of homologous chromosomes to produce new genetics combinations or recombinant phenotypes. The linkage is the tendency of closely placed genes on a chromosome to stay together during inheritance (no crossover and independent assortment). Completely linked genes do not show crossover and independent assortment; thereby produce only parental combinations. However, the incomplete linkage is the process wherein genes present on the same chromosomes exhibit crossover and hence produce recombinant phenotypes along with parental types.

Thus, the correct answer is option A.