Science · Topic 63 of 64

Chromosomes

Chromosomes are long threads of DNA packed tightly inside the nucleus of a cell. Humans usually have 46 chromosomes arranged in 23 pairs.

💡 Fun fact

If you stretched out all the DNA in one of your cells, it would be about two metres long.

All about Chromosomes

Chromosomes are long, tightly coiled threads of DNA inside the nucleus of a cell. They carry the genes that instruct the cell how to grow and function.

Most human cells contain 46 chromosomes arranged in 23 pairs, with one set inherited from each parent.

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Real-life uses of Chromosomes

Understanding inherited traits
Testing for some genetic conditions
Studying how living things are related

Frequently asked questions about Chromosomes

How many chromosomes do humans have?

Most human cells have 46 chromosomes, in 23 pairs.

Where are chromosomes found?

They are found inside the nucleus of cells.