AP BIOLOGY

CELL DIVISION

MEIOSIS

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
If there are 48 chromosomes in the skin cells of an organism, how many chromosomes would be found in the organism’s sperm cells?
A
48
B
24
C
96
D
12
Explanation: 

Detailed explanation-1: -When a diploid cell having 48 chromosomes divides, the four haploid daughter cells are produced at the end of meiosis II. Each daughter cell contains half of the chromosomes in number as that of the parent cell. Thus, it can be concluded that daughter cells produced from the parent cell will have 24 chromosomes.

Detailed explanation-2: -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-3: -A diploid cell has two complete sets of chromosomes. Most cells in humans are diploid, comprising 23 chromosome pairs, so 46 chromosomes in total. This is 22 pairs of autosomes and a pair of sex chromosomes.

Detailed explanation-4: -In meiosis, a cell containing the diploid number of chromosomes is converted into four cells, each having the haploid number of chromosomes. In human cells undergoing meiosis, for instance, a cell containing 46 chromosomes yields four cells, each with 23 chromosomes.

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