Question

Sex chromatin are present in

• A. Drumstick-like in lobe of lymphocyte
• B. Drumstick-like in lobe of eosinophil
• C. Drumstick-like in lobe of neutrophil
• D. Drumstick-like in lobe of basophil

Answer 1

The correct option is C

Drumstick-like in lobe of neutrophil

The correct option is C

.Explanation for correct option:

1. Human female allosomes are XX, while human male allosomes are XY.
2. Because females have two copies of the same chromosome, one of the X chromosomes is randomly inactivated to avoid gene duplication.
3. The inactive chromosome is referred to as the heterochromatin or sex chromatin.
4. It is found within the nucleus and is stained with basic dyes.
5. Sex chromatin, commonly known as the Barr body, is a clump of inactivated X chromosomes found in normal female cells.
6. The number of X chromosomes is one less than the number of sex chromatin.
7. Thus, sex chromatin is lacking in normal males (XY) and girls with Turner syndrome (XO).

Explanation for Correct options:

Option A

1. In normal mammalian females, sex chromatin is a highly stained clump within the nucleus of all subdividing cells.
2. It is the heterochromatin of an inactive X chromosome.

Option B

1. Sex chromatin is seen in neutrophils of normal females as a drumstick-shaped clump linked to one of the nuclear lobes.
2. The nucleus of neutrophils is lobed. The sex chromatin is found as a drumstick-shaped clump on one of the neutrophil nucleus's lobes.

Option D

1. The nuclei of blood cells have structural differences, but sex chromatin is only found in neutrophils.

Final Answer:

Sex chromatin is present in the drumstick-like in the lobe of neutrophils.