Eye color, Hair color, Blood types, and Other Traits
71 - 80 of 102 Answers
December 9, 2005:
How is it my grandmother smoked for nearly thirty years and is extremely healthy and looks great for 70? Whereas, my mother only smoked for 15 years before she had a stroke at the age of 38? I am curious since they are mother and daughter. Does genetics play a role in this circumstance?
October 6, 2005:
I am a natural redhead since birth and recently read in the newspaper that redheads will be extinct by the year 2100. Is this a good possibility and if so could I preserve my eggs for the red hair gene?
July 8, 2005:
My husband and I were wondering about the odds of making a red-headed child. He has very rich, very red hair. I on the other hand have had many hair colors and don't know what my genes are doing. From Birth to age 3, I had bright red hair. From about age 4 to 7 I had bleach blonde hair. After age 7 it turned sort of a dirty blonde, and has been ever since. My Dad had red hair till he was 30 years old then it turned dark brown. We are also very freckled people who sunburn very easily. I don't understand how hair color can change like that, and what genes I'm really carrying. If it helps, my mother has light brown hair and some freckles. Also, both my parents have green eyes, as do I. I hope you can at least explain the changing hair color phenomenon.
June 23, 2005:
Has any progress been made in explaining eye colors other than brown, blue, and green? I've seen dozens of explanations of how the gey (EYCL 1) and bey2 (EYCL 3) genes are supposed to work, all with the disclaimer that this model doesn't explain colors such as hazel, grey, or black (not to mention violet, yellow, or very pale blue). Are the pigments responsible for some of these colors thought to be related to specific genes? Can there be more than two alleles for a gene, such as green, hazel, or blue? Has anybody studied the heritability of unusual eye colors?
June 10, 2005:
Is it possible for two parents who cannot roll their tongues to have a tongue-roller child?
June 3, 2005:
I have always wondered about the genetics of handedness. Both of my parents are left-handed, both myself and my brother are right-handed. My husband and I are both right-handed and we have 2 children, one's a lefty and one's a righty. My husband's parents are both righties. It's just something I've always wondered about since we studied genetics in 6th grade and the teacher told us that handedness was Mendelian like eye color, but couldn't explain why I'm a righty (no doubt wondering if maybe I was adopted, which I wasn't, lol!)
May 26, 2005:
I am 15 weeks pregnant and I recently had a series of bloodwork done. I found out that I was AB+. My father is definitely O- and my mother is unsure of her type. I have seen online many sites that say this is not possible, that my father cannot have O-. Is this correct?
May 24, 2005: Is it possible for 2 Rh negative parents to produce a Rh positive child?
I am pregnant with my second child. My blood type is O-. My husband and daughter both have A-. At my last OB appointment I was told that at my next visit I would have an antibody screen and most likely need a Rhogam shot. I know this is administered as a precaution in case the baby is Rh+. However, I understood this to be impossible since both my husband and I are Rh-. When I questioned the nurse, I was quite surprised when she told me that it IS possible to have an Rh+ child because of recessive Rh+ genes. Is this true? All the information I have found so far leads me to believe this is impossible. (And yes, I am 100% certain beyond a shadow of a doubt that my husband is the father of my child).
April 26, 2005:
Hair Biology has always interested me and no matter where I look I can never find the appropriate answer to my question. Now I understand that African American hair has a curly follicle, which is what produces the curly hair texture as in many ethnic groups, but how come African Americans are essentially the only ethnic group with coarse curly hair? I don't mean to be rude while asking this question, but it has always been of interest to me. I want to understand the genetics behind it.
March 23, 2005:
Can blue-eyed parents have a baby with brown eyes? Or green eyes? Can two parents without a cleft chin have a child with one? Can two curly-haired parents have a child with straight hair?