McqMate
| Q. |
In man, the normal number of chromosomes is - |
| A. | 42 |
| B. | 44 |
| C. | 46 |
| D. | 48 |
| Answer» C. 46 | |
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Explanation: Chromosomes are the structures that hold our genes. Genes are the individual instructions that tell our bodies how to develop and function; they govern our physical and medical characteristics, such as hair color, blood type and susceptibility to disease. The typical number of chromosomes in a human cell is 46 - two pairs of 23 - holding an estimated 25,000 genes. One set of 23 chromosomes is inherited from the biological mother (from the egg), and the other set is inherited from the biological father (from the sperm). |
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