NEET PG DENTAL EXAM

EMBRYOLOGY

CHROMOSOMES AND CELL DIVISIONS

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Sex cells (egg and sperm cells) have twice the number of chromosomes as body cells.
A
True
B
False
C
Either A or B
D
None of the above
Explanation: 

Detailed explanation-1: -Egg and sperm cells have just 23 chromosomes each. That’s half as many chromosomes as regular cells. Through the process of fertilization, egg and sperm join to make a cell with 46 chromosomes (23 pairs), called a zygote.

Detailed explanation-2: -Human sex cells have twice the number of chromosomes as body cells. Genes pass from parents to offspring on chromosomes. The two chromosomes in a pair have the same genes lined up in the same positions. A fertilized egg has twice the number of chromosomes as the body cells of the parent.

Detailed explanation-3: -Normally, each cell in the human body has 23 pairs of chromosomes (46 total chromosomes). Half come from the mother; the other half come from the father. Two of the chromosomes (the X and the Y chromosome) determine your sex as male or female when you are born.

Detailed explanation-4: -Gametes contain half the chromosomes contained in normal diploid cells of the body, which are also known as somatic cells. Haploid gametes are produced during meiosis, which is a type of cell division that reduces the number of chromosomes in a parent diploid cell by half.

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