Biology for IGCSE & O level - Inheritance (Section 1 - No. 47)
If a couple is both carriers for an autosomal recessive disorder, what is the probability that their child will have the disorder?
0%
25%
50%
75%
Εξήγηση
Both parents are heterozygous (carriers). There is a 25% chance the child will inherit two recessive alleles.