Biology

Biology

B1: Genes, chromosomes and DNA

• inside every cell in your body is a nucleus. your nucleus contains your genetic material.
• your genetic material is arranged into chromosomes, and there are 23 pairs of chromosomes in your body.
• a gene is a short length of DNA, each gene is an instruction for a certain protein to be produced (structural/functional) 

the sex cells are different, there are 23 SINGLE chromosomes instead of 23 pairs, so when a woman releases an egg…