(C) $X$-linked recessive disorders are caused by mutations in genes located on the $X$ chromosome. Haemophilia-$A$,Colour blindness,and $G-6\ PD$ defi

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(C) $X$-linked recessive disorders are caused by mutations in genes located on the $X$ chromosome. Haemophilia-$A$,Colour blindness,and $G-6\ PD$ deficiency are well-known examples of $X$-linked recessive inheritance. $\beta$-Thalassemia is an autosomal recessive blood disorder caused by mutations in the $HBB$ gene located on chromosome $11$. Therefore,$\beta$-Thalassemia is not $X$-linked.

Class 12 Biology Principles of Inheritance and Variation Pedigree Analysis and Mendelian disorders

Medium

Which of the following is not $X$-linked recessive?

A
Haemophilia-$A$
B
Colour blindness
C
$\beta$-Thalassemia
D
$G-6\ PD$ deficiency

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Class 12

Biology Questions

Chapter

Principles of Inheritance and Variation

Subtopic

Pedigree Analysis and Mendelian disorders

Identify the incorrect statement.

Medium

View Solution

Match Column-$I$ with Column-$II$ and select the correct option.

Column-$I$ Column-$II$

$(P)$ Haemophilia $(i)$ Recessive gene: $X^{h}X^{h}$

$(Q)$ Colour blindness $(ii)$ Recessive gene: $pp$

$(R)$ Phenylketonuria $(iii)$ Recessive gene: $Hb^{s}Hb^{s}$

$(S)$ Sickle-cell anaemia $(iv)$ Recessive gene: $X^{c}X^{c}$

Column-$I$	Column-$II$
$(P)$ Haemophilia	$(i)$ Recessive gene: $X^{h}X^{h}$
$(Q)$ Colour blindness	$(ii)$ Recessive gene: $pp$
$(R)$ Phenylketonuria	$(iii)$ Recessive gene: $Hb^{s}Hb^{s}$
$(S)$ Sickle-cell anaemia	$(iv)$ Recessive gene: $X^{c}X^{c}$