this post was submitted on 13 May 2026
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Science Memes

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[โ€“] zstg@programming.dev 1 points 15 hours ago (1 children)

TIL identical twins can't (in most cases) be differentiated using DNA.

[โ€“] The_v@lemmy.world 1 points 14 hours ago

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....