Question

Identify proper term that deals with the transfer of genetic materials from one species into the gene pool of another by the repeated backcrossing of an interspecific hybrid with one of its parent species.

• A. Gene manipulation
• B. Retrogression
• C. Introgression
• D. Inbreeding

Hint:

Think of "Introgression" as "Introgressive Hybridization"—the gradual biological entry and integration of foreign genes into a species' genome through backcrossing.

Answer 1

The Correct Option is C

Step 1: Understanding the Concept:
Interspecific hybridization can sometimes lead to long-term gene flow between distinct species through hybrid intermediates that backcross with the parent populations.

Step 2: Detailed Explanation:
- Introgression (also known as introgressive hybridization) is the biological movement of genes from one gene pool into another.
This is accomplished when two distinct species successfully mate to produce an F1 interspecific hybrid, which then repeatedly backcrosses with one of the parental species over multiple generations.
Over time, this process incorporates specific genetic elements of the donor species into the genomic background of the recipient parent species.
- Inbreeding is the mating of closely related individuals.
- Retrogression is evolutionary or ecological decline.

Step 3: Final Answer:
The transfer of genetic material via repeated backcrossing of hybrids is defined as introgression.