GCSE biology

A gamete is a sex cell. In humans, gametes are sperm and eggs. DNA is a large and complex polymer, which is made up of two strands forming a double helix. DNA determines the characteristics of a living organism. With the exception of identical twins, each person’s DNA is unique.
Inside the cell’s nucleus are the chromosomes. Chromosomes are found in the nucleus of a body cell, and occur in pairs. One chromosome is inherited from the mother, and one is inherited from the father. These are…