How many chromosomes are present in a normal human body cell?
Answer and explanation
Correct answer: 46
A normal human body cell is diploid, meaning its chromosomes occur in 23 homologous pairs. The calculation is 23 pairs × 2 chromosomes per pair = 46 chromosomes. Therefore option A is correct. The number 23 applies to a typical human gamete, which is haploid, while 12 and 2 do not represent the complete chromosome number of a normal human body cell.
Frequently asked questions
What is the correct answer to this question?
46
Why is this the correct answer?
A normal human body cell is diploid, meaning its chromosomes occur in 23 homologous pairs. The calculation is 23 pairs × 2 chromosomes per pair = 46 chromosomes. Therefore option A is correct. The number 23 applies to a typical human gamete, which is haploid, while 12 and 2 do not represent the complete chromosome number of a normal human body cell.
Which subject and chapter does this question cover?
This is a Class 10 Science question. Chapter: World of Living. Topic: Heredity and Evolution.
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