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Colorblindness is not determined by blood type.

Everyone has two alleles for blood type: A, B, or O.

If one parent is AO and the other is BO, the child can be AB, AO, BO, or OO.

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Q: Why would a child be color blind have type 0 blood if one parent was type A and the other type B?
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Related questions

Do the parents have to be color blind in order for the kid to be color blind?

If the parent went blind due to an accident or a birth defect (born blind) then no. But if the parent has a disease that caused them to go blind then it is possible to inherit that as a child.


How do you know if your child is colour blind?

if you ask them what color it is and they say i do not see a color!


What is the probability that a woman who is a carrier of the colorblind gene and a color blind man will have a first son who will be color blind?

The probability is 0 (but the daughter will be a carrier of the color blind gene). This is because the gene dictating whether someone is color blind or not is linked to the X chromosome (and not the Y). The color blind gene is a recessive gene whilst the normal color vision gene is a dominant gene. Hence if a girl (XX) has one normal vision gene (from one parent) and one color blind gene (from the other parent), her normal vision gene will be dominant to the recessive color blind gene and hence she will have normal vision (but she will be a carrier of the color blind gene). If both her parents contribute the recessive color blind gene to her, then she will be color blind. For a woman (XX) to be color blind, she needs to be have both genes to be recessive (ie where there is no dominant normal color vision gene to dominate). For a man (XY), as long as the X gene contributed by his mother is a color blind gene, he will be color blind because he has no other X chromosome where a dominant normal color gene could reside. Hence, to answer the question, a man with normal color vision (XY, with a dominant normal color vision X gene since the gene can't be the recessive color blind gene otherwise he will be colorblind) and a colorblind woman (XX, both recessive color blind genes), will each contribute an X each the child. The man will contribute his only X chromosome which carries the normal color vision X gene and the woman can only contribute a recessive color blind gene. The man's normal color vision X gene will be dominant, and hence the daughter will definitely have normal vision (despite being a carrier).


What color tube for blood draw for metal poisioning in a child?

What color tube for blood draw for metal


How does your blood look as you see it in your eyes?

Color of blood when you look at it should be brilliant red (assuming you are not red-color blind) and when it clots its usually turns brownish.


Does the mother or father pass on the color blind trait?

It depends. If the child is male, the person to pass the trait on must be the mother. She may be a hybrid or color-blind herself for her to be capable of doing this. If the child is female, the father must be color-blind in addition to the mother being a carrier. Both have to donate the recessive gene to their daughter.


Are tortoise color blind?

Yes. They are color blind. :)


How will describe green color to a blind man?

You cannot. That is like describing love to a child. He has no comprehension of what green is.


What was the chance that the child will be color blind?

1 in 12 for men, 1 in 200 for women.


Can a child have blue eyes if both parents have brown?

98.5% of the time they have the color of the parent that has the dominate color, not the resessive unless they both have a resessive color.


What determines skin color in mixed kids?

The skin color of either parent can effect the skin color of the child.


What is the probability of color blindness if the father is color blind and the mother carries the trait?

All daughters are normal, half the sons are color blind. The above answer is incorrect. Half of the daughters are color blind and half of the sons are color blind. Since the father always donates color blindness, it is up to the mother in each case (in the son's case, the father is irrelevant) to determine if the child is color blind or not. Since she is a carrier, the chance is 50-50.