Inheritance of vision disorders?

If the mother is very nearsighted, what are the chances her children will have vision problems if:





a. the father has perfect vision


b. the father is nearsighted


c. the father is farsighted





If you can recommend a website for me to look this up at, I'd be grateful. Thanks!

Inheritance of vision disorders?
The answer depends on whether the gene is dominant or recessive. Myopia (nearsightedness) can be a problem with any one of a number of genes, and has been shown to be either recessive or dominant depending on what gene is mutated. There has been a lot of evidence for dominant inheritance though.





If the gene is dominant:


a. 50% (either the child inherits the gene or he/she doesn't)


b. 75% (the child would need two copies of the normal gene, and each parent has only one)


c. 75% (assuming the farsighted gene is also dominant...this would make the child nearsighted, farsighted, or both, unless he/she received two copies of the normal gene)
Reply:let's use common sense and basic genetics. the kid is getting basic gene sequence from both sources so it's all aobut what is dominant. i'll leave that to you
Reply:It all depends on the alleles but because the nearsighted or longsighted seems to be a mutation or next generation the perfect vision will be the dominant allele.





a=0% imposiible the perfect sight allele is the dominant one


b=100 is going to be nearsighted


c=imposible to tell as you dont know which one is the dominant allele.If both parents were hetrozygous the children could even well have perfect sight