LIFE SCIENCE

Detailed explanation-1: -In humans, each cell normally contains 23 pairs of chromosomes, for a total of 46. Twenty-two of these pairs, called autosomes, look the same in both males and females. The 23rd pair, the sex chromosomes, differ between males and females.

Detailed explanation-2: -The 23rd pair of chromosomes are two special chromosomes, X and Y, that determine our sex. Females have a pair of X chromosomes (46, XX), whereas males have one X and one Y chromosomes (46, XY). Chromosomes are made of DNA, and genes are special units of chromosomal DNA.

Detailed explanation-3: -46 is generally considered Because each human originates from a single cell. All other cells are just copies of that single cell. And that single original cell, the fertilized egg, the zygote, has 46 chromosomes.

Detailed explanation-4: -Human cells normally contain 23 pairs of chromosomes, for a total of 46 chromosomes in each cell .