By Damn - 06/05/2012 13:53 - Australia
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Ouch!! Oh haha
As everyone is saying, the discrepancies in your nephew's physical traits are hardly proof that your nephew isn’t your brother-in-law’s child. Regardless, if your sister did cheat, I've heard that people other than your husband have blue eyes, dimples, and freckles. Kind of makes you a bad wife for assuming that if your sister cheats, and it is mildly linked to your husband, that you would make that logical leap without further evidence.
Agreed with 86. The people in your family and your sister's husband's family may not have any of those recessive traits in their appearance, but it's possible that they each possess the dominant AND the recessive allele - making them heterozygous and therefore making it possible for your nephew to have the recessive traits you listed
This reminds me of something that happened to my mothers friend years ago. Her baby was born with african american skin/features even though they were both white w/brown hair. Her husband filed for divorce and she demanded a paternity test. In the end it turned out his great grandmother was black. Ah those tricky genes/family history. Things to look into before assuming.
There is way too much misinformation and speculation swirling around here. The fact is that hair, eye, and skin color do NOT follow strict Mendelian genetics patterns, and you can't just use a Punnet square to predict it. Just this weekend my wife and I had friends over who both have blue eyes, yet BOTH of their children have brown eyes. Mendelian genetics states that this shouldn't be possible, yet it is. There are many genes that control eye color in particular, so OP is way off base here in assuming infidelity.
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You obviously know nothing about how traits are passed from generation to generation. I feel sorry for your husband having to put up with your ignorance.
Not really. Blue eyes (though eye color is more complicated than most physical features) and freckles are recessive traits. It is possible for two people who do not show those features to give birth to someone who does (remember Mendel from science). Now if it was a dominant trait, like red hair, then you worry!
Dude. She could be Italian or something. It might be true, he could have cheated on her. There's enough reason of her to suspect that. Only once in a blue moon do things with recessive alleles happen in the most weirdest of times. There's a 100% Mexican boxer, who's family is completely and utterly Mexican, yet he turned out pale with red hair, and light blue/green eyes.
7, There are many topics that you don't expect the entire world to have an understanding of and genetics falls into that category. If anything, it'd suck to have anything to do with someone who is completely intolerant of any form of ignorance. People aren't going to know everything, what you should be hating on her for is jumping online and spouting bullshit before doing her research. This isn't ignorance, it's stupidity.
You do realize that blue eyes are a recessive trait(and I believe that dimples and freckles are as well) which means that the trait may not be noticeable for generations but then pop up when two people who have the recessive trait reproduce.
Thank you 8. I feel like OP is one of those women that will look for anything to say that their spouse is a cheating bastard. Example: OP: What is this? *shows husband lingere* Husband: Damn, you found them. I-- OP: So you ARE cheating on me! You bastard! Husband: What? No, of course not! It's close to our anniversary, and I wanted to get you something sexy. It's still on the hanger, for goodness sakes! OP:*huffs* Fine. But I'll catch you. Eventually... Yep. Sounds a lot like OP.
Having one dominant and one recessive copy of a gene will lead to the appearance dictated by the dominant gene but the recessive gene isn't suppressed or altered or anything like that and has an equal chance of being passed on to the persons children. Even though both OP's sister and brother in law both have say brown eyes, they could still be carrying the gene for blue eyes. If this is the case, every child they have has a 25% chance of getting two copies of the blue eye gene and having blue eyes. The chances decease when you consider more traits, but it is still possible that OPs brother in law is her nephews father and that her nephew just inherited a few recessive traits from his heterozygous parents, who wouldn't show them due to having a copy of the dominant gene.