Question
Biology Question on Genetics
Select the correctly matched pair about sickle cell anaemia:
Genotype: Phenotype
(A) HbA HbA : Diseased phenotype
(B) HbA HbS: Diseased phenotype
(C) HbS HbS: Diseased phenotype
(D) HbS HbA : Carrier of disease
Choose the correct answer from the options given below:
A
(C) and (D) only
B
(A) and (C) only
C
(B), (C) and (D) only
D
(A), (B) and (C) only
Answer
(B), (C) and (D) only
Explanation
Solution
The genotype HbS HbS leads to the diseased phenotype of sickle cell anaemia, while HbA HbS results in a carrier state. HbA HbA is the normal, healthy phenotype.