Question

If there is complete linkage in the F₂ generation:

Options

• there will be only parental combination

• new combination will be more than parental combinations

• parental combinations will be equal to the new combinations

• new combinations would be lesser than the parent ones

Answer 1

there will be only parental combination

Explanation:

Complete linkage occurs when two genes are very close on the same chromosome and there is no crossing over between them. As a result, these genes are inherited together as a unit, and no recombinant (new) combinations are formed. Hence, in the F₂ generation, only parental combinations will be observed because the alleles do not separate or recombine to create new allele combinations. This is a rare case and exemplified by Morgan’s experiment on Drosophila where linked genes are inherited together without recombination.