Eye color, Hair color, Blood types, and Other Traits

21 - 30 of 114 Answers

August 14, 2013: Do we know how the blue eye gene causes blue eyes?
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August 9, 2013: Is everyone with blue eyes related? How was that trait passed on?
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July 24, 2013: Could you please explain if it is possible for a father who has O positive blood and a mother with A positive blood to have a baby with O negative blood? I am a little confused and have been trying to research the answer. I would appreciate if you are able to assist.
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July 9, 2013: Did Rh- blood come from Neanderthals?  I have seen postings on the web that say that it entered human DNA around 35,000 years ago and that seems about right for coming from Neanderthals.
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July 2, 2013: Is a person “born gay”, or is being gay a learned behavior? 
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May 22, 2013: I have a question about the possibility of there being an eye color gene on the Y chromosome.  In my family, my paternal grandfather had a very distinct shade of blue eyes. My father, brother and nephew (brother’s son) all have blue eyes. Only the males in our family have blue eyes.  My mother and sister-in-law have green eyes.  When you look at the four generations of males it seems like the blue eyes have only been passed father to son.
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November 27, 2012: My grandma on my dad’s side had red hair and so does my wife.  What are our chances of having a redhead?
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November 14, 2012: I am pregnant and I was curious on the probability that our son will have red hair. My husband has bright red hair, and so did his mom. My grandmother, father and all my aunts and great grandmother had fire red hair while young. I have brownish-red hair. I would just like to know what our odds are.
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October 18, 2012: If my husband contains a dominant trait such as a broad nose, is there any possibility that my child will not have a broad nose?
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August 28, 2012: My mother has red hair, fair skin and freckles but her full brother has black hair and dark skin. No one ever believes that they are siblings because they look so different. How can this be possible?
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