I always thought that if one parent had blond hair and blue eyes and one parent had dark hair and green eyes... the genes of the lighter haired parent would dominate and the child would end up with that coloring.  My friend has the opposite understanding... a free lunch is riding on the answer.   Thanks.
122093
Your friend is correct. I just studied this in school. Dark hair always dominates light hair. And the allele for green eyes overpowers the allele for blue eyes.
452267
Its actually more complex than a typical simple black and white mix (referring to color)\n\nAlbinism is a genetic disorder that is quite recessive.  The possibility of the resulting child having the color of black, white or "blended" would depend if the child inherits the albinism. \n\nInheriting the afican parent's albinism depends on the caucasion's popsibilty of passing along albanism as well. \n\nTaking the albinism factor out of the equation and it is safe to say that the offspring of a person with black skin and a person with white skin will result in a blending of the skin colors. \n\nIt is also safe to assume that the offspring will appear to have more of an african-american (black) look as opposed to a caucasion (white) look and would appear to be a child of mixed heritage.
176163
Yes.\n\nBoth colour blindness and hemophilia are X-linked, and recessive. This means that if you are male, you will have the trait (because you only have 1 X chromosome), but if you are female, you have to have the disease on both your X chromosomes.\n\nThe 'normal healthy woman' had to get a hemophilia-X from her father (since he only has 1 X) - call it X(h) - and he was *not* colourblind so the X(h) doesn't carry the colourblindness mutation.\n\nShe also *had* to get a colour-blind-X from her mother, since her mother has to have 2 copies in order to *be* colourblind - call it X(b). So, she is X(h) X(b).\n\nShe marries a colourblind but not hemophiliac man: he must be X(b)Y. No other option.\n\nThere are thus four different possible outcomes for their children:\n\nX(b) X(h) mates with X(b)Y:\n\nX(b) X(b) - colour blind daughter\nX(b) Y - colour blind son\nX(h) X(b) - normal daughter (but carries both recessive traits)\nX(h) Y - hemophiliac son\n\nHope that was clear enough! :)
41928
To have a sudden trait pop up out of nowhere is called a mutation. Because your mother had a nose and your father had a nose, and these noses were in their genetic code, YOU have a nose. No surprise there, right?\nCertain regions of the world are going to have certain traits (dark skin, light hair, blue eyes, taller structure, etc) because that is simply what is passed down to them. If you had the lightest blond hair and had children in Japan with a Japanese woman, there is a CHANCE that your children would have light hair too. But your grandchildren will have darker hair... and great grands darker still. After a few generations your blond hair genes will have dissipated into the black hair genes that surround you.\n(This is why certain countries like the U.S. are called "melting pots": so many genes mixing together that you can have all kinds of results.)
89031
Scientists have reported that they've found an "extremely unusual" trait in the cells of some mothers with two or more gay sons, providing more evidence to suggest that homosexuality might be inherited.\n\n\nMothers of multiple gay sons were about six times more likely than other women to process their X chromosomes in a certain way, researchers discovered.\n\n\nResearchers aren't entirely sure what the findings mean, said study co-author Sven Bocklandt, a postdoctoral researcher at UCLA. Making things more complicated, about 75 percent of mothers of multiple gay sons don't have the trait.\n\n\nStill, the study, released Tuesday in the journal Human Genetics, raises plenty of questions, Bocklandt said, especially as researchers try to figure out whether homosexuality has genetic roots and if there truly is a "gay gene" -- or genes.\n\n\n"What everybody wants is the gene, and we don’t have it yet," Bocklandt said. "But this is an independent confirmation that the X chromosome is involved."\n\n\nBocklandt and colleagues looked at a phenomenon known as X-chromosome inactivation, in which cells inside the bodies of females automatically turn off -- or inactivate -- one of their two X chromosomes. That leaves them with one working X chromosome -- just like males, who have a single X and a single Y chromosome.\n\n\nNormally, each cell in a female's body randomly turns off one or the other X chromosome. In some cases, such as when families share a genetic disease, there is "extreme skewing" -- one X chromosome is more likely to be turned off than the other, Bocklandt said.\n\n\nIn the new study, the researchers looked at 97 mothers of one or more gay sons and 103 women with no gay sons to see what their blood cells did with their X chromosomes. The researchers recruited many of the women with the help of PFLAG.\n\n\nThey found that nearly a quarter of the mothers of multiple gay sons inactivated the same X chromosome -- in other words, nonrandomly -- compared to just 4 percent of the women without gay sons. Of those with one gay son, 13 percent inactivated the same X chromosome.\n\n\nDr. Ionel Sandovici, a genetics researcher at the Babraham Institute in Cambridge, England, who is familiar with the research findings, cautioned that the study is small, with just 44 mothers of multiple gay sons being examined. More research in larger groups must be done to confirm the results, Sandovici said.\n\n\nThe research does provide "circumstantial evidence" that the X chromosome contributes to the development of male sexuality, Sandovici said. But "we still understand very little about molecular mechanisms of sexual orientation, and this seems to be rather a complicated biological puzzle."\n\nBut of course its Nature vs. Nurture and its possible that the person could just become gay because of his environment/experiences or just be born that way.
306640
My son is interracial and he is the most beautiful male I have ever seen. Not just Mama bias, either...strangers remark on how handsome he is. I think it's something to do with getting the best of both races. Whatever it is, I have seen very few (maybe 2) 'mixed' people that I would say are unattractive.
143848
The amount of melanin in the skin.  This trait is passed down from your parents, so it is genetic.  But the amount of the dark pigment melanin in the skin determines the color of your skin.
118636
Greying hair is genetic from the MOTHERS side. Take a look at your relatives.
424561
No one on this planet is 100% percent anything because I am pretty sure down every body's gene pool there a mixture of  different races. I am disturbed by this question because it sounds like  you are trying to imply if Beyonce's mother was just a Black woman, which she appears to be because Black people come in all shades and colors, that Beyonce would not be pretty which is untrue. Beyonce's mother parents were French speaking Louisiana creoles and most of them are considered Black.  My grandmother, who have both Black parents, is lighter than Beyonce's mother ,have longer hair than Beyonce and her mother,  have blue eyes and I myself have dark skinned parents but I am light as Beyonce's mother. I have friends who are albino with green eyes that have dark skinned parents and know that their ethnicity is Black. My point in saying this is that there is no certain way a Black person should look.
473869
Well, let`s see. My mom is hispanic and has hazel eyes and very black hair with medium skin. My dad is anglo and has black hair and green eyes and medium skin. My sister has brown eyes and black hair with a little darker skin, my brother brown hair and green eyes with medium skin, and I have grey eyes and reddish brown hair with medium skin. My mom`s sister is darker than her and all her kids turned out darker than us with black hair and brown eyes. Her husband was anglo also with brown hair and blue eyes. So what you get is a luck of the draw.
582361
Your dad carried one recessive gene for green eyes, which his gene for brown eyes was dominant, so he shows that he has brown eyes.  you got one recessive gene from your mother, and the recessive gene from your dad, making you show for recessive, making you have green-blue eyes. the same way worked for your son
294531
Because of the recessive and dominant genes that you inherit.\nWhen the sperm and the egg join together, they each carry half of the total genetic mixture that creates a person. Sometimes, the skin-color genes of one person "dominate" over that of the other, but other times the "recessive" genes outnumber the dominant ones and so the other skin color "wins".\n\nI'm not a genetics expert, but from my little knowledge I can tell you that it's all the result of a pretty much random combination process. Sometimes the recessive (or "weaker") genes outnumber the dominant ones, and "win", while sometimes the dominant ones do.\n\nhttp://en.wikipedia.org/genetics
489392
the result of fl is barr(if it is dominant) or else white.one main ground rule of inheritance is that it may be white or barr but one can be dominant only for 2 generations it's not the matter but in  the third gen.the recessive will take the turn
49203
100% of sons will be colorblind\n100% of daughters will be carriers\n\nYes this could stand up in court because there is no chance that the daughter recieved one of the recessive alleles from her father (because he would have to express the trait if he did).\n\nHowever, the man can still be her father, if a random mutation occured, x inactivation occured on the chromosome containing the dominant allele, chimerism, or perhaps an error in another gene caused the color-blindness...\n\nMost likely though, the man would not be her father. A deduction would not be made only on the fact that the daughter is color blind and the father isn't. A paternity test would need to be done.\n\nAnd I don't know what the hell kittybriton is talking about. People shouldn't attempt questions they don't know the answer to.
77625
because light colored eyes are recessive to dark colored eyes. Dark colors are more dominant and stronger. As with most recessive genes, it is more prone to infirmity and weaknesses.
180072
yes, it depend on the genetics of the parents.  If the skin color gene for melanin is dominant then the child will have some or little melanin.  The child can even look like the mom's black parent. it's Genetics.  You can tell if a child is mixed or not.  People of color comes in all shades to pale pink to blue black.  I person with to black parents can have a child that fair skin. remember both parents are black and their parents are black.  We all are mixed.  NO One is pure.
439339
1. heterozygous: Punnett square is Pp x pp\n2. dominant b/c if it was recessive that would be the only type of allele the parents would pass on and all their children would have to be intensely freckled\n3. the Punnett square would be a 4x4 box with the B's and C's independant of each other. so on one side you have BC, Bc, bC, and bc with all of those showing up on the other side as well b/c the female was the same genotype as the male.  Obviously the black color is dominant b'c the male is heterozygous and black so all heterozygous offspring and all homozygous dominant offspring will be black as well.  the question gets a little fuzzy here though, i think you may have left some out b/c we don't know which of the two genes controls color or if they both do how the interaction between them works.  I'd be glad to help further if you have any more information to supply.