if the gene for colorblindness were carried on the y chromosome,what kind of pattern would you expect to see?
78687
All the boys will have colorblindness. it depends strongly on the parental generation though.\nSince the father gives the progeny an X OR a Y chromosome (since boys are XY), to dictate the sex of the progeny, and the mother can only give an X chromosome (since girls are XX), therefore if the gene for colorblindness was on the Y chromosome, only the boys would have it because girls cannot have a Y chromosome. :)
493494
x x -> color-blind female\nX Y -> normal male\n----\nx Y ; x X -> offsprings\n\ngiven the conditions, the chances are:\n0%  to have a color-blind daughter\n\n50% to have normal but carrier children\n50% to have color-blind children\n\n0% normal sons\n100% color-blind sons\n0% color-blind daughters\n100% normal but carrier daughters\n\nsince red-green color-blindness is a recessive trait, the mother would have the trait in both her x chromosomes. the father had normal vision so he would have the normal gene which is dominant for the trait. \n\nsince males get their x chromosome from their mother and the y chromosomes from their father, all sons borne would be color-blind because whatever the x chromosome they receive from their mother would have the gene for color-blindness. though the trait is recessive, this one gene would be enough to manifest itself because males only have one x chromosome. \n\nsince females get an x chromosome from each parent, all daughters would get a normal x chromosome from their father and an affected x chromosome from their mother. and because females have two x chromosomes and color-blindness is recessive, they would need to have two affected genes for the trait to be manifested thus all daughters borne would have normal vision. the dominant gene they received from their father would mask or overpower the affected gene they inherited from their mother. however, these daughters are also called carriers because the affected x chromosome they received from their mother can be passed on to their own sons wherein the color-blindness trait can then be manifested.
840120
I heard that, and I heard the same thing about Blue eyes.  Most reputable sources say it is wrong, but it seems to make sense to me.  Blonde hair and blue eyes are recessive traits and you'd think the dominant traits would eventually take over in the human race.  That's evolution, right? But who knows.  Science has been wrong before.
617160
Chromosomal abnormalities, and missing or extra chromosomes.\n\nAlso sex: there are some XY people who appear to be female.
249918
You are giving me the impression that green eyes are due to a recessive gene since you have brown eyes and a recessive gene for green eyes, and also since your husband has green eyes and has a recessive for green eyes, he must have both recessive genes for green eyes. In that case, here is your probability, maintaining that brown is dominant over green and that B stands for a dominant brown eye and g stands for a recessive green eye.\n\nHere is you then: Bg and here is your husband gg\n\n\nBg X gg  After chromosome segregation:\n\nB g  g  g  And then crossing,\n\nBg, Bg, gg, gg are the possibilities. Now wherever the dominant gene B is, the eyes will definitely be brown. So there are two kids out of four with brown eyes and two out of four with green eyes. And that makes it a 50-50 % chance that you will have either kid.\n\nWhatever you are hoping for, you have a good chance I believe.
202401
maybe if u were color blind or just dazed
686748
I'm going to have to go with \n\nc) trysomy\n\nbecause there is NO way that it can reveal phenotype (so A and D are out).  And I know for a fact it can reveal trysomy\n\n"Karyotype analysis can detect large chromosomal abnormalities such as loss or gain of an entire chromosome or portions of a chromsome and translocations (when a portion of a chromosome breaks off and rejoins with another chromosome, a common occurrence in leukemias)."
58471
Chromosomes, either X or Y.
967941
What colorblindness is:\nColor blindness (color vision deficiency) is a condition in which certain colors cannot be distinguished, and is most commonly due to an inherited condition. Red/Green color blindness is by far the most common form, about 99%, and causes problems in distinguishing reds and greens. Another color deficiency Blue/Yellow also exists, but is rare and there is no commonly available test for it. \nDepending on just which figures you believe, color blindness seems to occur in about 8% - 12% of males of European origin and about one-half of 1% of females. I did not find any figures for frequency in other races. Total color blindness (seeing in only shades of gray) is extremely rare. \nThere is no treatment for color blindness, nor is it usually the cause of any significant disability. However, it can be very frustrating for individuals affected by it. Those who are not color blind seem to have the misconception that color blindness means that a color blind person sees only in black and white or shades of gray. While this sort of condition is possible, it is extremely rare. Being color blind does keep one from performing certain jobs and makes others difficult. \n\nLife's minor frustrations (and occasional dangers) for the color blind:\nWeather forecasts - especially the Weather Channel - where certain colors just can not be distinguished on their weather maps. Also, maps in general because of the color coding on the legends. \nBi-color and tri-color LEDs (Light Emitting Diodes): Is that glowing indicator light red, yellow, or green? \nTraffic lights, and worst of all, Caution lights: Color blind people always know the position of the colors on the traffic light - in most states, Red on top, Yellow in the center, Green (or is that blue?) on the bottom. It isn't good when we go to a city or state where they put traffic lights horizontal - it takes a couple of days to get used to that one! But caution lights present an entirely different problem. In this situation there is only one light; no top or bottom, no right or left, just one light that is either red or yellow - but which is it? \nGetting in the sun with your girlfriend: So, you're out in the boat or on the beach with your girlfriend and soaking up the rays. But I can't tell until far too late if I'm getting red - or if she is. If I can tell it's red, by that time it's fire engine red and a painful sunburn is already present. \nColor observation by others: "Look at those lovely pink flowers on that shrub". My reply, looking at a greenish shrub "What flowers?" \nPurchasing clothing: I've got some really neat colors of clothes. Not everyone appreciates them like I do though; they seem to think the colors are strange. I just don't know why! \nKids and crayons: Color vision deficiencies bother affected children from the earliest years. At school, coloring can become a difficulty when one has to take the blue crayon -and not the pink one- to color the ocean. \nTest strips for hard water, pH, swimming pools, etc.: A color blind person is generally unable to : \ninterpret some chemical reactions \nsee that litmus paper turns red by acid \nidentify a material by the color of its flame such as lead blue or potassium purple \ninterpret the chemical testing kits for swimming pool water, test strips for hard water, soil or water pH tests - all of which rely on subtle color differences and a band of similar colors to compare against. \nCooking and foods: \nWhen cooking, red deficient individuals cannot tell whether their piece of meat is raw or well done. Many can not tell the difference between green and ripe tomatoes or between ketchup and chocolate syrup. \nSome food can even look definitely disgusting to color deficient individuals. For example, people with a green deficiency cannot possibly eat spinach which to them just look like cow pat. They can however distinguish some citrus fruits. Oranges seem to be of
667533
It's because since girls have 2 X chromosomes and males only have one X then all the genes are going to try to fit in that one X chromosome the male has and that's where colorblindness comes in, the gene for colorblindness is more likely to appear in males' genes because they only have 1 X chromosomes.\nwell that's all I know hope I helped!
546665
The genes for eye color determine the amount of melanin, a dark brown pigment, produced in the iris of the eyes. Blue eyes are due to a lack of melanin, while brown eyes indicate melanin-rich irises. Thus, people with darker hair and skin have higher levels of melanin and tend to have brown eyes, while people with lighter hair and skin have lower levels of melanin and usually have lighter colored eyes.
802960
The women and the man would have a heterozygous geneotype\n\nThe woman's genotype would consist of a gene for B blood and for O blood.\nThe man's genotypes would consist of a gene for A blood and B blood.  \n\nSince O is a ressisve gene, A and B would dominiant the blood type for their children who could have an A, B or AB blood type.  \n\nFollowing a basic 2 x 2 Punnett square, the statistics of a child getting a homozygous B blood type would be 1/4; a AB blood type would be 1/4; for getting a heterzygous A or B blood type with a ressive O gene would be 2/4 or 1/2.
221778
Homozygous red-eyed female: X^W X^W\nWhite-eyed male: X^w Y\n\nF1:\n\n------ X^W --------- X^W\n--------------------------\nX^w | X^W X^w --- X^W X^w\n----|\nY --| X^W Y ------ X^W Y\n\nGenotype: 2 X^W X^w : 2 X^W Y (1:1)\nPhenotype: 100% of offspring have red eyes.\n\nF2:\n\n------ X^W --------- X^w\n--------------------------\nX^W | X^W X^W --- X^W X^w\n----|\nY --| X^W Y ------ X^w Y\n\nGenotype: 1 X^W X^W : 1 X^W X^w : 1 X^W Y : 1 X^w Y\n\n1 of each.
833631
Since you haven't given the context, you could be right...\n\nY is dominant to y.\nIt may well be that Y (green) is dominant to y (yellow), since often genes are name after what happens when they don't work.  The gene that causes fruitflies to have red eyes is actually called "white".  Stupid, huh?  W (red) is dominant to w (white).  Hope I haven't confused you.
774901
Some diseases are carried on the x chromosome and others on the y.
709683
Color blindness is a sex-linked thing (giggles from the 5th grader)\nThe gene is on the X chromosome.  Men get one X and one Y chromosome.  If their X has the gene for color blindness, there is no matching gene on the Y chromosome to "cover" for the defective gene.  The color blindness is expressed.\n\nWomen, however, are blessed with 2 X chromosomes.  If they get a gene for color blindness, the other X usually has a normal gene that can "do the work" that the abnormal gene cannot.  Color blindness is not expressed, and she is a carrier of the gene.\n\nWomen can be color blind if their color blind Dad marries a carrier Mom, and she gets 2 defective genes.\n\nHow's that?
721873
THAT PRETTY LAME IF YOU ASK ME.GENETICS AND GENES AND CHROMOSONES ARE THE CONSTANT ENVIRONMENTMENTALLY UNFRIENDLY OR MAYBE FRIENDLY COMPONETS THAT DESIGN A HUMAN BABY. HOW THE CHILD WILL APPEAR LIKE HAIR COLOR SEX EYE COLOR AND IF THEY CAN HEAR OR SEE ARE ALL GENETICALLY INSPIRED.IF YOUR A MALE TAKE A LOOK AT YOU OWN MOM AND HER DAD.IF YIUR FEMALE LOOK AT YOUR DAD AND HIS MOM.DNA WILL DEFINITELY GIVE YO AND IDEA WHAT YOU WILL APPEAR WHEN YOUR OLDER.