Heterogametic Female Species
Which of the following female is heterogametic:
- Buffalo
- Pig
- Poultry — Correct Answer
- Human
Explanation:
Correct Answer: Poultry
In birds (poultry), the sex-determination system is reversed compared to mammals. The female is heterogametic (ZW) and the male is homogametic (ZZ).
Sex Chromosome Systems — Comparison
| Group | Male | Female | Heterogametic Sex |
|---|---|---|---|
| Mammals (humans, cattle, pigs, buffalo) | XY (heterogametic) | XX (homogametic) | Male |
| Birds (poultry, duck, turkey) | ZZ (homogametic) | ZW (heterogametic) | Female |
| Snakes, some insects | ZZ | ZW | Female |
Chromosome Numbers in Poultry
- Chicken/Dog: 2N = 78 (76 autosomes + 2 sex chromosomes)
- Poultry female: 76 + ZW; Poultry male: 76 + ZZ
- Since females are heterogametic in birds, sex-linked traits in poultry follow a reversed 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.
