MCQ
Thalassaemia is
- ✓Autosomal recessive disease
- BAutosomal dominant disease
- CSex-linked dominant disease
- DSex-linked recessive disease
$(i)$ It is an autosome-linked recessive disesase
$(ii)$ It occurs due to either mutation or deletion resulting in reduced rate of synthesis of one of globin chains of haemoglobin
$(iii)$ Anaemia is the characteristic of this disease
$(iv)$ Thalassaemia is classified into two types
$1.$ $\alpha$ - thalassaemia Production of $\alpha$-globin chain is affected. It is controlled by the closely linked genes $HBA1$ and $HBA2$ on chromosome $16.$ It occurs due to mutation or deletion of one or more of the four genes.
$2.$ $\beta$-thalassaemia Production of $\beta$-globin chain is affected. It occurs due to mutation of one or both $HBB$ genes on chromosome $11$
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Statement $I$: The presence or absence of hymen is not a reliable indicator of virginity.
Statement $II$: The hymen is torn during the first coitus only.
In the light of the above statements, choose the correct answer from the options given below :
$I.$ Ventillation in humans is an active process
$II.$ Diaphragm helps in generating the pressure gradient in the lungs
Choose the correct option