Question
Question: A certain type of anaemia exists in two forms, major (severe) and minor (mild). The following table ...
A certain type of anaemia exists in two forms, major (severe) and minor (mild). The following table relates the genotypes of both types of sufferer to that of a normal person.
| person | genotype |
|---|---|
| Non sufferer | NN |
| minor sufferer | NA |
| major sufferer | AA |
If NA marries NA, the chance of each of their children being midly affected is:–
A
1 in 1.
B
1 in 2.
C
1 in 3.
D
1 in 4.
Answer
1 in 2.