The first step to understanding this diagram is knowing what a chromosome is. A chromosome is a structure that contains DNA, which determines the genetic information for each individual.

There are 23 pairs of chromosomes in humans and one pair of sex chromosomes (X or Y) – so there are 46 total chromosomes in most cells. Chromosomes come from the body’s nucleus and they contain all your genes!

chromosomes, genetics, dna @ Pixabay

However, chromosomes are not just found in the nucleus. If you open up your cell and look at it under a microscope, you would see that there are also many organelles scattered around inside of it.

The mitochondria are one example – this structure contains DNA as well! This diagram summarizes chromosome packing across different cell types:

Nucleus- all 46 human chromosomes can be seen here (23 pairs of autosomes and one pair of sex chromosomes)

Mitochondria- each type has its own set of genes for energy production; mitochondrial DNA is circular

Chloroplast- these plant cells contain several hundred chloroplasts that use light to produce food from carbon dioxide and water via photosynthesis

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