21 - 30 of 52 Answers
December 9, 2009:
Why don't I have freckles while my parents and brother and various aunts and uncles do?
October 7, 2009:
I understand that lack of sunshine led to Caucasians becoming pale because of lack of vitamin D. But how did it happen?
September 15, 2009:
I just read an article about a South African teenage girl who was asked to take a gender test after winning an 800-meter race by a huge margin over the other runners. The article said that the gender testing was a very complex procedure. Why is it complex? Wouldn't a simple genetic test for a Y chromosome answer the question?
November 6, 2008:
Where do different skin colors come from?
June 26, 2008:
Do we know how genetics affect survivability? I know several people who have had medical conditions that were expected to be fatal, yet were not. Is it possible that along with the tendency towards certain diseases or bodily malfunctions could the ability to resist the symptoms also be inherited? It occurs to me that the fact that the gene is indeed passed on to future generations is only possible due to an ability for its carriers to live long enough to pass on the defective gene.
June 5, 2008:
I have read that aging happens when genes go bad over time. If human genes did not undergo deterioration, would humans live indefinitely?
March 27, 2008:
I assume genes control everything about me, including my moods. Can my genes be modified to make me more happy, better able to succeed, better able to meet goals I might set for myself?
November 16, 2007:
I have a cleft chin, should all my children have one too? It is a dominant gene, right?
June 8, 2007: I was born without wisdom teeth and my father was as well. My mother, brother, and sister all had them removed. Have my dad and I evolved or would this just be considered a genetic mutation?
May 25, 2007:
My dad and I want to settle something. Are baldness and other generally male traits caused by dominant genes on the Y chromosome, or recessive genes on the X chromosome?