Those haircolours
2 blonde parents and 4 brown haired kids. /facepalm
shareYou clearly didn't pay much attention in science class when the teacher talked about genetics. My parents both have brown hair and me and one of my siblings both have blonde hair.
shareOh, I paid much attention in science class. You on the other hand didn't. Blonde hair colour is a recessive trait whilst brown is dominant.
shareThis proves how little got through that thick skull of yours. As long as there is a blonde gene from the parents, even if they both have brown hair, the child could be blonde.
shareyes, but not the other way around.
shareBoth parents have blond hair, which means there is no "brunette gene" in play. So the kids are supposed to be blond, which is the OP's point. When you don't know how the most basic logic works, maybe it's better not to start an argument.
shareAre you stupid? Just because the parents didn't get brown hair, doesn't mean there isn't a possibility of a child getting brown hair. As long as someone in the family had it (ie grandparents or something).
shareJust because the parents didn't get brown hair, doesn't mean there isn't a possibility of a child getting brown hair.
Yes, that's exactly what RECESSIVE trait means. If one parent had even ONE "brunette allele", he/she would not be blond. We already know the parents are both blonde, so there is NOT EVEN ONE "brunette allele". The father has two "blond alleles". The mother has another two "blond alleles".
The child will get one allele from each parent (picked at random). From the father - either blond, or blond; from the mother - either blond, or blond. So the child will always get two "blond alleles", regardless of random choice, and will, therefore, be blond, like the parents.
Dark haired parents can have light haired kids as long as they're both heterozygous, meaning each of them has a "brunette allele" and a "blond allele". Light haired parents are always homozygous, so all their kids will be light haired.
My advice: read up on the basics of genetics, it might help clear the confusion. Oh, and meanwhile, insulting people by default, without even knowing what they're talking about, does not make you sound more credible - you should first try to understand what is being said and, if it DOES sound stupid, THEN say it, while backing up your claim. Maybe you were not aware of this... it's ok, just do better the next time. share