Why do some siblings look alike and some dont?

I am the oldest of three children, all of us full-blooded siblings. For reference, my mother is short, heavy-set, with thick, curly, dark brown hair and dark brown eyes. She's also naturally tan. read more

Because we all get a mix of genes from each parent, and each egg and each sperm are quite different from each other. For example: Bob’s Mom is Chinese. Bob’s Dad is English. read more

confident, in fact i understand 2 contraptions of fraternal twins that have been very distinctive. one set is two men, one ordinary around confronted tall heavier construct, the different boy is skinny small angular face and darkish hair and darker pores and skin tone. the different set have been male and lady and lots the comparable one darkish one mild and distinctive facial shape. you will not assume those childrens have been siblings no longer to point twins. read more

But brothers and sisters don't look exactly alike because everyone (including parents) actually has two copies of most of their genes. And these copies can be different. Parents pass one of their two copies of each of their genes to their kids. Which copy a child gets is totally random. And this is a big reason why you don't look like your brother. read more

Each child Bob and Sue have has a 25% chance of getting some genes that look “Asian” and a 75% chance of getting the “white” version of those genes. So, the child could have straight black Chinese hair, and blue Caucasian eyes. read more

"Another way to look at it: you inherited 50% of your autosomal DNA from each parent, but you didn't necessarily inherit exactly 25% from each grandparent. Your maternal grandparents contributed exactly 50% in total, but it could be biased in favor of either your maternal grandmother or your maternal grandfather. read more