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It is just the DNA lottery. If neither parent is colorblind that just means that one of them (or both of them) have recessive genes for colorblindness that happened to show up in this particular child.

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7y ago

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How is colorblindness transferred from the parent to the child?

We know that if a father is colorblind and the mother is neither colorblind nor a carrier, then the sons will not be colorblind. So, using logic, that means that the father can't cause a son to become colorblind. Process of elimination would point towards whenever a son is colorblind that it comes from the mother. A diagram explaining how colorblindness is inherited can be viewed in the related links.


What is the probability that the son is colorblind if the moms colorblind and the father isn't?

100


What is the probability that a colorblind women and a man with normal vision will have a colorblind son?

50%Answer100%


What circumstances can the son of a colorblind father also be colorblind?

alota peeple think yur stupid


A colorblind man and woman with normal vision whose father was colorblind have a son what is the probability that their son is colorblind?

Make a punnet square with the mother above, her genotype would be: X^B X^b, and the father to the left whose genotype is X^b Y.The probability of having a colorblind CHILD is 50%. The probability of them having a SON is 50%. Since we are asked what the probability of their SON being colorblind, it is 50% as well. The reason is because the chance of having a colorblind son, among sons only, (according to the punnet square) is 50%.


Why is a son who receives the allele for combinations from his mother always colorblind?

Since the mother would be considered a carrier, the gene will be produced in the offspring. the son will receive that gene and will be colorblind.


Father isn't colorblind mother is a carrier--one son is colorblind but the other is not how?

It is called x-linked alleles. It is rare for a female to have color blindness because the allele must be passed from both parents. Males only need one allele to be color blind.With the equation, color blind female and non-color blind male reproduce. Each son has a 50% chance of developing the disorder.


If a normal woman whose father is color-blind marries a colorblind man what are their chances of having a colorblind son?

50%


What must occur for a girl to be color blind?

The girl must have a copy of the gene on each X chromosome. This means that she must have a father who is colorblind and a mother who is either a carrier or is colorblind.


Can two persons with normal vision produce a colorblind son?

No they will produce a child who is colour blind.


A womens father is colorblind She marries a colorblind man Will there son or daughter be colorblind?

Colorblindness is an X-linked recessive disorder. This means girls (who have the sex chromosomes XX) must have a colorblind X from dad and a colorblind X from mom. Boys only need to have one colorblind X to be colorblind because they have sex chromosomes XY (and have only 1 X). If the dad has it, he has the colorblind X. If the daughter has it, she must have gotten her mom's colorblind X. If the mom is colorblind, then every child they have will be colorblind. If the mom is not colorblind, then she must be a carrier - she must have 1 normal X and 1 colorblind X. Mom is either colorblind (with 2 colorblind Xs) or she is a carrier. Dad is definitely colorblind.


What if Mary and her mother are both colorblind is Mary's father colorblind too?

If Mary's mother is colorblind, and therefore carries the colorblind gene on one of her X chromosomes, then Mary would inherit that gene as well. If Mary's father is colorblind, he would have to pass on his X chromosome with the colorblind gene to Mary, making her colorblind too. If only Mary's mother is colorblind, Mary's father is likely not colorblind.