Heterogametic Female Species
Which of the following females is heterogametic (produces two types of gametes regarding sex chromosomes)?
- Buffalo
- Pig
- Poultry — Correct Answer
- Human
Explanation:
Correct Answer: Poultry
In poultry (birds), the female is heterogametic — she carries ZW sex chromosomes (produces Z-bearing and W-bearing gametes). The male is homogametic (ZZ).
Sex Chromosome Systems
| Species | Male | Female | Heterogametic sex |
|---|---|---|---|
| Mammals (cattle, buffalo, pig, human) | XY (44+XY) | XX (44+XX) | Male (XY) |
| Poultry (birds) | ZZ (76+ZZ) | ZW (76+ZW) | Female (ZW) |
This distinction is important because the heterogametic sex determines sex of offspring. In poultry, since the female is heterogametic (ZW), sex-linked traits (on Z chromosome) show a different inheritance pattern compared to mammals.
📚 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.
