EVERYDAY SCIENCE

SCIENCE

CELL BIOLOGY

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
If a species had 50 chromosomes in its body cells, how many would be found in its gametes?
A
100
B
25
C
50
D
None of the above
Explanation: 

Detailed explanation-1: -Therefore, the gametes in a body cell will have 25 chromosomes.

Detailed explanation-2: -The Number of Chromosomes (n-Value) Human gametes contain 23 chromosomes. We can summarize this statement as 1n = 23 where n is the n‑value, the number of chromosomes in a gamete. When a 1n = 23 sperm fertilizes a 1n = 23 egg, the zygote will be 2n = 46.

Detailed explanation-3: -Gametes are haploid cells i.e. they contain half the number of chromosomes of the normal somatic cells of the body. Somatic cells are diploid in nature. Since the gamete has 7 chromosomes, the somatic cells will have twice this number i.e. 14 chromosomes.

Detailed explanation-4: -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. For each chromosome pair, one homologous chromosome came from each parent.

Detailed explanation-5: -To get the possible gamete combination of gametes, the formula is 2 raised to the power n (2^n), where n=the haploid number of a cell. To get the haploid number given the diploid number of a cell, the diploid number must be divided by 2. So the possible combination of gametes in a cell with a diploid number of 6 is 8.

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