JAMB - Biology (2016 - No. 41)
When sickle cell carrier marries a normal woman, the probability of them having a normal offspring is
0.75
0.25
0.5
.1
Paskaidrojums
A sickle cell carrier (AS) and a normal woman (AA), when crossed will yield:
2 normal offsprings (AA) and 2 sickle cell carrier (AS).
Hence, the probability of a normal child = \(\frac{2}{4}\)
= \(0.5\)