Question

2n-2 is known as:

• A. Monosomic
• B. Trisomic
• C. Nullisomy
• D. Polyploidy

Answer 1

The correct option is C

Nullisomy

The correct option is C:

Explanation of the correct option:

1. Nullisomy is a genetic condition in which a pair of chromosomes is missing from the species (2n-2).
2. It is a type of aneuploidy.

Explanation of the incorrect options:

Option A:

Monosomic is a genetic condition that occurs due to the loss of a single chromosome from the chromosomal composition (2n-1).

Option B:

Trisomic is a chromosomal condition when there is the addition of an extra chromosome (2n+1).

Option D:

1. Polyploidy is a disorder in which an organism has an extra set of chromosomes.
2. It leads to an increase in a whole set of chromosomes.

Final answer: 2n-2 is known as nullisomy.