| A | B |
|---|
| Alleles | different forms of the same gene |
| Genotype | The alleles a person has |
| Phenotype | The physical characteristics a person has |
| Dominant | An allele which you only need to inherit one copy of to inherit the characteristic |
| Recessive | An allele which you must inherit two copies of to inherit the characteristic |
| Homozygous | Both of the alleles are the same |
| Heterozygous | Both of the alleles are different |
| Sickle cell anaemia | An example of a codominant disease |
| Cystic fibrosis | An example of a recessive disease |
| Rhesus blood groups | Very important for pregnant women to know |
| Blood group O | The universal donor |
| Blood group AB | The universal acceptor |
| Blood group A | has anti B antibodies |
| Blood group B | has anti A antibodies |
| Haemolytic disease of the newborn | A disease caused when a rh- mother has an rh+ baby |
| AB fathers | Cannot have O children |
| Agglutination | scientific name for clumping |
| Codominant | Both alleles produce a functional protein |
