NEET2020ZoologyPrinciples of Inheritance and VariationActual
Select the correct match.
Options
- APhenylketonuria – Autosomal dominant trait
- BSickle cell anaemia – Autosomal recessive trait, chromosome-11
- CThalassaemia– X linked
- DHemophilia– Y linked
Correct answer
B. Sickle cell anaemia – Autosomal recessive trait, chromosome-11
Step-by-step solution
PHENYLKETONURIA: Cause: This inborn error of metabolism is also inherited as the autosomal recessive trait. The affected individual lacks a liver enzyme called phenylalanine hydroxylase that converts the amino acid phenylalanine into tyrosine. The genes for the disease are located on chromosome no. 12. SICKLE-CELL ANAEMIA: Cause: As it is an autosomal recessive disease therefore it can be transmitted from parents to the offspring when both male and female individuals are carriers (heterozygous) for the gene. The ge