Question

HOW ARE CHROMOSOMES FORMED ?


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Answer 1

Answer:

When cell is in interphase(resting stage), the nucleus of the cell consists all chromosomes put together as a long thread like structure, ie., DNA in double helixes structure. In the beginning of first phase of the cell division called prophase, the long thread like helical DNA condenses and divide into 46 chromosomes according to their characteristics and become clearly visible in the second phase of cell division called metaphase. That is how the chromosomes are formed within the nuclear cells.

Answer 2

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Chromosomes are formed in neucleus of the cell. During cell division, neucleoplasm (found inside neucleus) condenses to form thick thread like structures called chromosomes. And hence, chromosomes are formed.

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• Chromosomes are the part of a cell that contains the genetic material of that organism .i.e, DNA .
• They are present in the nucleus of the cell.
• Humans contains 23 pairs (43) chromosomes. Different species of organism contains different number of chromosomes.