Is it possible for two parents with black hair and brown eyes to have a baby with blonde hair and blue eyes?
435531
The 1:4 ratio others are giving you are wrong.  If there are two separate traits you want to find the recombination ratio for you need to do a punnet square (google that I'm not explaining).  Long story short, if the parents are heterzygous for the dominant gene (they carry one dominant and one recessive gene), there will be a 1:16 chance that the child will inherit *both* homozygous recessive traits.\n\nHere, the recessive traits are blue eyes and blong hair; dominant traits are brown eyes and black hair.
811517
Yes it's possible\ni've heard it b4 two years\ni sorry 4 u as i can't explain it \nsearch 4 a good website\nTHE pigmentation doesn't depend on the sun rays \nall that's built - up b4 birth\njust there wud be a slight difference after exposure to sunlight
1185780
yes, it is technically possible.\n\nHowever, as you say, it is almost infinitely unlikely.  The chance of fraternal twins being identical would be the same as any two other siblings being identical.\n\nEach parent has a pair of each of the 23 different chromosomes.  you will get one of two chromosomes in each set from each of your parents.  \n\nIf you assume the odds of getting any one of the two chromosomes of each pair from each parent are 50/50 (assume that each chromosome in each pair is different-which should be true unless there was some incest in your family), the odds would be 2^46 to 1 that a sibling happened to get the same 46 chromosomes.  that comes to about 1 chance out of 70 trillion. (that is, of being genetically identical).\n\nanother way to calculate this is to figure the odds of having two genetically identical eggs from a woman, which is one in 8.4 million, and mulitplying the odds of having two identical sperm from a man, which is also one in 8.4 million, and multiplying these two numbers together-which gives you 1 chance in 70 trillion.\n\nthere are other possible factors, such as how each egg was treated (so were some genes turned on or off), astrology, mitochondrial DNA (which should be the same between any siblings so shouldnt be a factor), development in the womb, and others.  However, i assume what you were talking about was if they could be genetically identical, which they can, 1 out of 70 trillion times.\n\nthe odds of winning the powerball lottery are 70 million to one.  so if you played the lottery one time for each time someone had twins, you would win the powerball lottery one million times for each time someone had identical fraternal twins.\n\nthe chance of two random sets of parents having identical twins is theoretically possible, but the odds of that are so extremely low, it makes the odds of the lottery or identical fraternal twins look like a near certainty.
152790
Both parent were heterozygous
1096018
There is a WONDERFUL site that you can input both parents eye colors (and their parents) and it will tell you the percentages of what you offsprings eyes could be!\n\nhttp://www.thetech.org/genetics/\n\nDown near the bottom left it will have the link for you to launch the application to do the test.
456048
Dark hair is on a dominant gene where as light hair is on a recessive gene.  This is also why more people have brown eyes than blue eyes.
912389
there are several genes in play\nlets start wtih eyes.. simply knowing his eye color is a start BUT you also need to know his parents eye color becuase he could be hiding a recessive gene..\nassuming he isnt - the kids will ALL have brown eyes.. but if he has a recessive blue gene then the kids have a 50/50 chance of blue or brown eyes...\nand so on for all genetics\n\nanyhow so in truth NOT only god.. but anyone with a knowledge of genetics can predict...\none thing though - get married before you start pumping out the kids.. and stop after 1 kid - the world is plenty crowded of people already
422882
well the child would have homozygous brown eyes. Most likely the child will have red hair, because red is dominant. However I would have to know the genotypes for the hair colors to be sure.
548899
It could be any colour from ebony black to snow white.See the link below for an extreme example.\n\nSkin colour genetics is not simple recessive/dominant. It is a very complex trait based on at least 8 genes on 5 different chromosomes. As a result it is perfectly possible for children to be considerably darker or lighter than either parent. \n\n\nBeing "mixed heritage" makes no difference whatsoever. All humans are of mixed heritage and always have been. There isn't some hypothetical pure human heritage that has only one skin colour present.
265325
If both parents have blue eyes, then the child will have blue eyes.  Because blue eyes are a recessive gene, so, blue eyed people only carry blue eyed genes.\nOn the other hand, brown eyed people can be carrying a blue eyed gene, since brown is the dominant gene.  Two brown eyed people, both carrying one blue eyed gene, could give birth to a blue eyed child.\n\nMy aunt has brown eyes, but someone in her lineage had blue eyes.  My uncle has blue eyes.  They gave birth to 3 girls, all with blue eyes.  Which means my aunt was carrying the recessive blue eyed gene and passed it along to her children.\n\nBut, to your question, the only way to definitively say a child will have any particular color eyes is if two people with blue eyes have kids.  Then, the kids will have blue eyes.  In all other cases, the eye color of the children will be unknown.
1020063
Yes but they would have to be fraternal twins, and their mother would have to be a xxxx\n\nSuperfecundation is the fertilisation of two or more ova from the same cycle by sperm from separate acts of sexual intercourse. The term is also sometimes used to refer to the instances of two different males fathering fraternal twins, though this is more accurately known as heteropaternal superfecundation. This therefore leads to the possibility of twins also being half-siblings
33434
yes you can. The reason is because every time you have a child, they all have different combinations of the man and woman's chromosomes in them.
220078
eye color is determined by two genes, one from the father and one from the mother. Blues eyes require 2 recessive genes, both blue. Hence, if either the mother or father has blue eyes one of the genes is provided. The other parent could have brown eyes, and still have a recessive blue gene. However if that parent has two dominant brown eye genes, the child will be born with brown eyes. The only garauntee is to have 2 parents with both blue eyes.
1181473
It can happen but it is very rare. The mother could have had the trait for blue eyes and blonde hair.
323325
My white cousin has several black kids.  I think it is whichever parent's gene's are more predominant but here is something interesting . . . Doris Day, white as white can be, gives birth to a black baby.  Her husband accused her of cheating.  She did not cheat.  She was then told that the black nanny who raised her was really her mother.  She never knew.  It can come out generations later.
1017847
Blue eyes is a recessive trait.  Someone on both your mother and father's side of the family has blue eyes and you just so happened to luck out genetically.
694770
sure, the parents probably have two recessive traits, green and blue eyes, and for the child the dominant trait showed up, brown eyes\nin a simple way, a baby gets one of two variations of a gene from each parent\ndominant trait is dominant because when it is paired with a recessive, it shows up instead of the recessive one. recessive traits only show up when the baby gets the same two recessive traits from the parents\nall other choices will make the baby get brown eyes\nin this case my teacher said that brown eyes is a dominant trait