Genotypes and phenotypes, MZ and DZ twins

Genotype- an individual's genetic make-up

Phenotypes- expressed characteristics resulting from genes and environment

Illustrating differences:

➡one twin fed a more nutritious diet would be much taller and stronger than the other

➡individuals that have PKU (a recessive genetic disorder) diagnosed early can develop normally under a special diet; those that don't, tend not to accomplish important developmental milestones

➡haemophilia (another…