Chromosomal Condition 2N-2 Reflects Which Aneuploidy
The 2N – 2 condition of chromosomes reflects:
- Monosomy
- Monoploidy
- Trisomy
- Nullisomy — Correct Answer
Explanation:
Correct Answer: Nullisomy
2N − 2 = Nullisomy (loss of both members of a homologous pair).
Aneuploidy Conditions
| Notation | Condition | Change |
|---|---|---|
| 2N − 1 | Monosomy | Loss of one chromosome |
| 2N − 1 − 1 | Double monosomy | Loss of one each from two pairs |
| 2N − 2 | Nullisomy | Loss of both from one pair |
| 2N + 1 | Trisomy | Addition of one chromosome |
| 2N + 2 | Tetrasomy | Addition of two from same pair |
Euploidy Conditions
- 2N − N = Monoploidy
- 2N + N = Triploidy
- 2N + 2N = Tetraploidy
📚 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.
