Interpreting Recombination Frequency
If recombination frequency is between 0 to 0.5 then it is-
- Complete linkage
- Incomplete linkage — Correct Answer
- No linkage
- All the above
Explanation:
Correct Answer: Incomplete linkage
When the recombination frequency (RF) is between 0 and 0.5 (exclusive), it indicates Incomplete (Partial) linkage. The genes are on the same chromosome but separated enough that crossing over sometimes occurs between them, producing some recombinant gametes.
Interpreting Recombination Frequency
| Recombination Frequency | Type of Linkage | Interpretation |
|---|---|---|
| RF = 0 (0%) | Complete linkage | No crossing over; genes always inherited together (e.g., male Drosophila, female silk moth) |
| 0 < RF < 0.5 (0–50%) | Incomplete / Partial linkage | Some crossing over; genes on same chromosome but partially separable |
| RF = 0.5 (50%) | No linkage / Independent assortment | Genes on different chromosomes OR very far apart on same chromosome; follows Mendel's 2nd law |
Map Distance (Centimorgan)
- 1 centimorgan (cM) = 1% recombination frequency
- RF directly proportional to distance between genes on chromosome
- Exception to Mendel's 2nd law: Linkage
📚 About this Topic — Animal Genetics & Breeding
This multiple choice question is from Animal Genetics & Breeding, Animal Refresher. It has 4 options with a detailed explanation of the correct answer. Practice more MCQs from Animal Genetics & Breeding to strengthen your preparation.
