Ask a Geneticist

I thought I heard a geneticist on TV say that the gene that creates blond hair also creates blue eyes, and I thought he suggested that only blonds have blue eyes - is this correct?
I read on your website about the mice that ended up different colors based on what their mom ate while pregnant. How does that work?
Can two parents with blue eyes have a child with brown eyes?
Can two parents with blue eyes have a child with brown eyes?
How the two gene model of eye color works
If evolutionary theories hold true, how did the leap from 24 to 23 chromosome pairs occur from 'apes' to humans? How is it possible for two chromosomes to merge into one, and for the resulting species to survive to breed?
Two different colored eyes
Is diabetes a genetic disease?
Does the dominant allele for a given trait show up as the prevalent phenotype in the population at large? For example, the presence of dimples is controlled by a dominant allele, but the majority of people do not have dimples. Why is this?
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?
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 an
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
There are a lot of cases of lupus on my mother's side of the family. Both my mom and my younger sister have it. Is lupus genetic? Can I pass it on to my daughter? I want to know -- I have seen what this illness can do. I want to be ready.
My eleven year old daughter was born with blue eyes. When she was about five months old one eye began to turn brown but the other one stayed blue. She now has one predominately blue eye with a touch of brown in one area and a predominately brown eye
Eye color against the rules 1
Eye color against the rules 1
Eye color against the rules 1
Hello, I am trying to understand more about the gene that is responsible for cheek dimples and chin dimples. I understand how a set of parents <i>Dd</i> and <i>Dd</i> could have a child that is dimpleless, but is it genetically possible for a set
I am a redhead and I have Rh negative blood. Is there any genetic correlation between the two? Also, what is the difference between Rh negative and Rh positive blood types? Thanks
My father is an identical twin and my husband's grandfather is a fraternal twin. Does this increase our chances of having twins, or is the genetic trait only on the mother's side and only for fraternal twins? (P.S. we've always hoped for twins - a b
Is it possible for two brown eyed people to have a child with blue eyes? Both of these people have one parent with blue eyes,and one parent with brown eyes. Can brown-eyed parents have a blue-eyed baby?

Recent Questions

August 27, 2014: I understand that both environmental and genetic factors affect a person's height. There is a belief among most people I've talked with that given that groups of ethnic peoples eat the same diet, that the different ethnic groups will have varying and predictable heights, based on their race. For example, my friends believe people of African descent will be tall as will Scandinavian descendants. However, they believe people of Asian descent will be shorter. I wonder if there is a section of DNA discovered that determines a person's height and if indeed a person's race is a good indicator of their height? 
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August 19, 2014: I read on your site that a recessive trait is often the result of a broken gene.  I can’t seem to figure out why a broken gene would lead to the green peas in Mendel’s famous experiment.  Do they know why yellow is dominant over green?
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August 5, 2014: If identical twins have the same DNA, how do you tell who the daddy is?
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July 30, 2014: I was wanting to ask a question about ASD. One of my friends has identical male twins with only one of them being diagnosed on the Autistic spectrum. Her 2 year old daughter has also been recently diagnosed to be on the autistic spectrum. There is no history of autism on either the maternal or paternal side of the family. Firstly, how is it possible that genetics would be responsible if in the set of identical twins only one child has autism? Is it possible that germline mutations occurred due to environmental factors?
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Preguntas recientes

October 21, 2009: ¿Es posible que dos padres con ojos azules tengan un bebé con ojos cafés?
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October 21, 2009: ¿Es posible que dos padres con ojos azules tengan un bebé con ojos cafés?
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June 4, 2009: Leí en su página de Internet acerca de los ratones que resultaron ser de diferentes colores debido a lo que comió la mamá mientras estaba embarazada. ¿Cómo funciona eso?
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August 29, 2007: Si las teorias de la evolución son correctas, cómo es que ocurrió el cambio de 24 a 23 pares de cromosomas de "los simios" a los humanos? Cómo es posible que dos cromosomas se unan y que la nueva especie surgida sobreviva y logre reproducirse?
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