Chromosome Condition 2N-2
2N-2 condition of chromosomes reflects-
- Nullisomy — Correct Answer
- Monoploidy
- Monosomy
- Tetraploidy
Explanation:
Correct Answer: Nullisomy
The chromosome condition 2N − 2 is called Nullisomy — loss of both members of one homologous pair of chromosomes.
Types of Aneuploidy (Change in Number of Chromosomes in a Set)
| Condition | Formula | Name |
|---|---|---|
| Loss of both from one pair | 2N − 2 | Nullisomy |
| Loss of one chromosome | 2N − 1 | Monosomy |
| Double monosomy | 2N − 1 − 1 | Double Monosomy |
| Addition of one chromosome | 2N + 1 | Trisomy |
| Double trisomy | 2N + 1 + 1 | Double Trisomy |
| Addition of two chromosomes | 2N + 2 | Tetrasomy |
Types of Euploidy (Change in Number of Sets of Chromosomes)
- 2N − N = Monoploidy (loss of one set)
- 2N + N = Triploidy (addition of one set)
- 2N + 2N = Tetraploidy (addition of two sets)
📚 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.
