Final answer:
When the mother has sickle trait (AS) and the father is normal (AA), the probability of the offspring having the sickle trait is 0%.
Step-by-step explanation:
In this case, when the mother has sickle trait (AS) and the father is normal (AA), we are looking at the inheritance pattern of autosomal recessive disorders. The sickle trait is determined by the presence of the sickle cell gene, which is recessive. This means that for a child to have the sickle trait, they must receive a copy of the sickle cell gene from both parents.
When the mother has sickle trait (AS) and the father is normal (AA), the mother can only pass on the sickle cell gene (S) or the normal gene (A) to her offspring. The father can only pass on the normal gene (A) to his offspring. So, the possible genotypes for the offspring are:
AA (normal)
AS (carrier of the sickle trait)
Since the sickle trait is an autosomal recessive disorder, both parents need to pass on the sickle cell gene for the child to have the sickle trait. Therefore, the probability of an offspring having the sickle trait when the mother has sickle trait (AS) and the father is normal (AA) is 0%.