Home › TS EAMCET › Biology › Principles of Inheritance and Variation › Which genotype shows the diseased phenotype of s…
Which genotype shows the diseased phenotype of sickle-cell anaemia?
AHomozygous for HbA
BHeterozygous HbA and HbS
CHomozygous for HbS
DHemizygous for HbA
Answer & Solution
Correct answer: C. Homozygous for HbS
Only people homozygous for HbS are affected, as heterozygotes are carriers with the sickle-cell trait.
Related questions
The total number of chromosomes in a normal human cell is what?Polyploidy is often seen in which group of organisms?Absence of one chromosome of a pair is termed what?Klinefelter's individuals have which feature besides masculine development?Turner's syndrome results from what chromosomal change in females?Who first described Down's syndrome in 1866?Chromosomal disorders arise from absence, excess or abnormal what?Alpha thalassemia involves genes on which chromosome?