i don’t get how parents and children are “one generation apart” while children and siblings are “two generations apart” despite having the same ancestors (parents)? thank you
In: Biology
You get half your dna from each parent.
So between you and one parent you have 50% in common (ignoring the stuff that was the same for both of them).
Your sibling also gets half from each of your parents, but critically a different half.
Imagine a deck of cards and you deal out half of them to you. Then you get another full deck of cards and deal out half to your sibling. Some of the cards you will have both got, some of them only one of you will have gotten. It turns out that roughly half of each of your cards are in common, or 25% of all the cards.
Latest Answers