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Key WordsDefenition
Genotype Our genetic make-up, for example "BB" "bb".
Heterozygous These individduals carry two different allel.
Homozygous These individuals carry two copies of the same allel.
Dominant Allel Always shows, even if the individual only has one copy of the allel. You only need one copy of the allel to have brown eyes.
Recessive Allel Only shows if the individual has two copies of this allel. You need both copies of the allel for blue eyes to have blue eyes
Phenotype The characteristics which show up in our apperence.
Chromosomes Made from long molecules called DNA. There are 23 pairs of them in a human cell's mucleus.
Created by: claudiadg