State whether the following statements are true or false:

Each normal cell in our body contains 23 chromosomes.

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Solution

Answer: False

There are 46 chromosomes (23 pairs) present in human body which can be classified into two main types

Autosomes- These are exactly similar chromosomes in both males and females (22 pairs). These are found in somatic cells.

Allosomes or sex chromosomes which always occur in pair. In males, it is XY and in females it is XX.

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Similar questions

State whether the following statements are true or false :

(a) The estrogen hormone develops deeper voice in males at puberty.

(b) Menstruation stops in men permanently around the age of 45 to 50 years.

(d) The sex chromosomes in all the gametes (sperms) of a man are not identical.

(e) Half the female gametes contain X chromosomes and the other half contain Y chromosomes.

(f) It is the sperm which determines the sex of a child.

(g) Each normal cell in our body contains 23 chromosomes.

(h) A girl should not be allowed to work in the kitchen during menstruation.

(i) A woman (mother) is responsible for the sex of her child.

(j) Metamorphosis in insects (like silk moth) is brought about by thyroxine hormone.

State whether the following statement is true or false

If there are 46 chromosomes in a cell there will be 23 chromatin fibres inside the nucleus during interphase.

State whether the statements are true or false.

The ovum contains XX chromosomes.

X

Y

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