Question

In a human, how many chromosomes are present in a brain cell ?

Answer 1

Hint: Brain cells of the human body are somatic cells. All somatic cells of the human body are diploid which means that they contain two copies of each chromosome.

Complete answer:
Humans have 23 pairs of chromosomes which means in total there are 46 numbers of chromosomes in a cell.
All somatic cells like Brain cell, skin cell, or any other cell of the body which is somatic contains 23 pairs of chromosomes or 46 chromosomes in total. While the gametes which are the sperm and ovum are haploid which means they have only 23 chromosomes.
The real reason behind this type of number difference is the type of division. The somatic cells are formed by the process of mitosis which means that the number of chromosomes remains unchanged and the daughter cells formed have the same number of chromosomes as in parent cells that is why mitosis is also called equational division.
While the gametic cells are formed by meiotic division which means the daughter cells formed will contain a half number of chromosomes as compared to the parent cell that is why meiosis is also called a reductional division.

Note:
In humans, the parent cell is having 46 chromosomes then -
After mitosis, the number of chromosomes in daughter cells will be 46 which is the same.
After meiosis, the number of chromosomes in daughter cells will be 23 which is half the number of parent chromosomes. Resulting in haploid daughter cells.