Chromosomes in Donkey Egg Cell
The no. of Autosomes & sex chromosomes normally present in donkey egg cell is-
- 31 + Y
- 31 + X — Correct Answer
- 62 + XY
- 60 + XY
Explanation:
Correct Answer: 31 + X
A donkey has a diploid chromosome number of 2N = 62. Haploid gametes (egg cells) contain N = 31 chromosomes. Since female donkeys are XX, all eggs carry one X chromosome. So the egg cell has 31 autosomes + X.
Chromosome Numbers of Related Species
| Species | 2N (Diploid) | N (Haploid gamete) |
|---|---|---|
| Horse | 64 | 32 + X or Y |
| Donkey | 62 | 31 + X or Y |
| Mule (Mare × Jack) | 63 | Sterile (unequal chromosome pairs) |
| Hinny (Stallion × Jennet) | 63 | Sterile |
Note: Mules and Hinnies have 63 chromosomes (odd number) and are sterile because chromosomes cannot pair evenly during meiosis.
📚 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.
