Changes

: The [[genotype]] of two [[Monozygotic Twin|identical twins]] is the same.

: A different [[genotype]] in two [[organism]]s can result in the same [[phenotype]]. For example two people may both have a [[phenotype]] of brown eyes but one has a [[genotype]] containing two copies of the [[allele]] for brown eyes while the other may have one copy of the [[allele]] for blue eyes.