Represented below is the inheritance pattern of a certain type of trait in humans. Which one of the following conditions could be an example of this pattern?
If a father and son are both defective in red-green colour vision, is it likely that the son inherited the trait from his father ? Comment.
If a boy's father has haemophilia and his mother has one gene for haemophilia; what is the chance that the boy will inherit the disease
In Huntington’s disease, the unaffected persons are homozygous for normal allele $h$. The following is erroneous because