The genome (or genetic heritage) of any living being is contained in each cell that constitutes it.
It contains all the information that will determine not only the appearance but also the functioning of the body.
It is made up of chromosomes which are big chains ofDNA made up of molecules arranged together by forming sequences of codes, the genes.
You have to imagine the genome as a huge book written with 4 letters A-T and CG, which thus pair A with T and C with G.
Each chromosome comes from the mixture of genes from the maternal and paternal lines inherited from previous generations.
Each cell of a human being contains 46 chromosomes – 23 pairs. A chromosome pair determines sex; XX feminine, XY masculine.
The DNA chain forming a chromosome is 2m long and, to be able to enter a cell nucleus, takes a helical shape and packs on itself
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