(B) Down syndrome is a chromosomal disorder caused by the presence of an additional copy of chromosome number $21$ (trisomy of $21$).This condition af

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(B) Down syndrome is a chromosomal disorder caused by the presence of an additional copy of chromosome number $21$ (trisomy of $21$).This condition affects the autosomes,not the sex chromosomes.Therefore,the sex chromosome complement in a male child with Down syndrome remains normal,which is $XY$.

Class 12 Biology Principles of Inheritance and Variation Chromosomal disorders

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What is the sex chromosome complement in a male child with Down syndrome?

AIPMT 1990 All AIPMT

A
$XO$
B
$XY$
C
$XX$
D
$XXY$

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Class 12 Questions

Class 12

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Chapter

Principles of Inheritance and Variation

Subtopic

Chromosomal disorders

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AIPMT 1990 Paper All AIPMT years →

The cause of Turner's syndrome in humans is:

Medium

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What is the cause of $Down's$ syndrome?

DifficultAIPMT 1992

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The trisomic condition of $Down's$ syndrome arises due to:

MediumAIPMT 1991

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Match Column $-I$ with Column $-II$ and select the correct option.
Column $-I$ Column $-II$
$(P)$ Turner syndrome $(i)$ Sex chromosome $(2n-1)$
$(Q)$ Down syndrome $(ii)$ Sex chromosome $(2n+1)$
$(R)$ Klinefelter syndrome $(iii)$ Autosomal $(2n+1)$

Medium

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Which chromosomal aberration does the following figure indicate?

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Column $-I$	Column $-II$
$(P)$ Turner syndrome	$(i)$ Sex chromosome $(2n-1)$
$(Q)$ Down syndrome	$(ii)$ Sex chromosome $(2n+1)$
$(R)$ Klinefelter syndrome	$(iii)$ Autosomal $(2n+1)$

What is the sex chromosome complement in a male child with Down syndrome?

Similar Questions

The cause of Turner's syndrome in humans is:

What is the cause of $Down's$ syndrome?

The trisomic condition of $Down's$ syndrome arises due to:

Match Column $-I$ with Column $-II$ and select the correct option.Column $-I$Column $-II$$(P)$ Turner syndrome$(i)$ Sex chromosome $(2n-1)$$(Q)$ Down syndrome$(ii)$ Sex chromosome $(2n+1)$$(R)$ Klinefelter syndrome$(iii)$ Autosomal $(2n+1)$

Which chromosomal aberration does the following figure indicate?

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Match Column $-I$ with Column $-II$ and select the correct option.
Column $-I$ Column $-II$
$(P)$ Turner syndrome $(i)$ Sex chromosome $(2n-1)$
$(Q)$ Down syndrome $(ii)$ Sex chromosome $(2n+1)$
$(R)$ Klinefelter syndrome $(iii)$ Autosomal $(2n+1)$