Question

L-shaped chromosomes are
A) Sex chromosomes
B) Acrocentric
C) Telocentric
D) Submetacentric

Answer 1

Hint:The thread-like structures present within the nucleus of both the plant and the animal cells are called chromosomes.

Complete answer:
Chromosomes are composed of DNA strands tightly coiled around the protein histone which is responsible for supporting its structure. These are invisible to the nucleus of the cell when the cell is not in the phase of its active division.
Option A: A sex chromosome is defined as a particular chromosome type that contributes its efforts to the process of sex determination. Humans and other advanced mammals feature two distinct sets of chromosomes – the X and the Y chromosome and each of them have got their independent structure which describes their name itself. Therefore, this is the incorrect option.
Option B: Humans contain five different acrocentric chromosomes numbered – 13, 14, 15, 21, and 22. Each of them features a cytogenetically similar short arm that is often described as extremely gene poor. The acrocentric chromosome features a J-shape in its appearance. Therefore, this is the incorrect option.
Option C: A telocentric chromosome features only a single arm and has the ability of extending at both the ends giving rise to a physical appearance of an I-shaped chromosome. Therefore, this is the incorrect option.
Option D: The sub-metacentric chromosome is formed when a chromosomal pair features two unequal segments. One of these segments is quite larger than the other one which results in the formation of an L-shape.Therefore, this is the correct option.
Thus, the correct option is (D) Sub-metacentric.
Note: Every single chromosome features a protein and a single molecule of the deoxyribonucleic acid (DNA). Every chromosome contains its specific constriction point or centromere which is responsible for dividing the chromosome into two different sections or arms.