Process Increasing Desirable Genes
The process that increases the frequency of desirable gene without introducing new gene is known as-
- Inbreeding — Correct Answer
- Outbreeding
- Selection
- None
Explanation:
Correct Answer: Inbreeding
Inbreeding increases the frequency of homozygous genotypes for alleles already present in the population without introducing any new genes from outside. It concentrates and fixes existing genetic material — both desirable and undesirable.
Inbreeding vs Outbreeding — Gene Introduction
| Method | Introduces New Genes? | Effect on Existing Genes |
|---|---|---|
| Inbreeding | No — works only with genes already in population | Increases homozygosity; fixes desirable (and undesirable) alleles; increases prepotency |
| Outbreeding (out-crossing) | No — same breed, different animals; no new genes from outside | Increases heterozygosity within breed |
| Crossbreeding | Yes — introduces genes from another breed | Exploits heterosis; breed complementation |
| Grading up | Yes — repeatedly uses pure-bred sires | Gradually replaces non-descript genetics with pure-bred genes over 7–8 generations |
📚 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.
