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Key Words | Defenition |
---|---|
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. |