Consider the following about chromosomes in the human body 1 They are found in the nucleus of cells ...........

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Consider the following about chromosomes in the human body.

1.They are found in the nucleus of cells.

2.Each chromosome is made up of DNA tightly coiled many times around proteins.

3.Chromosomes are the most clearly visible element of a cell.

Select the correct answer using the codes below.

1 and 2 only

1 only

2 and 3 only

1, 2 and 3

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Explanation:

In the nucleus of each cell, the DNA molecule is packaged into thread-like structures called chromosomes. Each chromosome is made up of DNA tightly coiled many times around proteins called histones that support its structure.
Chromosomes are not visible in the cell’s nucleus—not even under a microscope—when the cell is not dividing.
However, the DNA that makes up chromosomes becomes more tightly packed during cell division and is then visible under a microscope.
Most of what researchers know about chromosomes was learned by observing chromosomes duringcell division.