Identical twins - one egg + 1 sperm that splits into two after fertilization aka clones. This happens randomly in the population.
Fraternal twin - Two different eggs + 2 different sperm from daddy. They are siblings that happen to share a uterus. This genetic in some families.
Semi-identical twins - One egg + 2 sperm. The egg splits before it is fertilized. The genetically identical eggs are fertilized by different sperm. Freaky huh…
TIL identical twins can’t (in most cases) be differentiated using DNA.
Identical twins - one egg + 1 sperm that splits into two after fertilization aka clones. This happens randomly in the population.
Fraternal twin - Two different eggs + 2 different sperm from daddy. They are siblings that happen to share a uterus. This genetic in some families.
Semi-identical twins - One egg + 2 sperm. The egg splits before it is fertilized. The genetically identical eggs are fertilized by different sperm. Freaky huh…