(D) The correct matches are as follows:$1$. Down's syndrome $(P)$ is caused by an extra copy of chromosome $21$,which is an autosomal trisomy $(III)$.

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(D) The correct matches are as follows:$1$. Down's syndrome $(P)$ is caused by an extra copy of chromosome $21$,which is an autosomal trisomy $(III)$.$2$. Klinefelter's syndrome $(Q)$ is characterized by an extra $X$ chromosome in males $(XXY)$,which is a sex chromosomal trisomy $(I)$.$3$. Turner's syndrome $(R)$ is caused by the absence of one $X$ chromosome in females $(XO)$,which is a sex chromosomal monosomy $(II)$.Therefore,the correct sequence is $(P-III, Q-I, R-II)$.

Class 12 Biology Principles of Inheritance and Variation Chromosomal disorders

Medium

Match the following columns:

Column-$I$ (Disorder) Column-$II$ (Ploidy)

$P$. Down's syndrome $I$. Sex chromosomal trisomy

$Q$. Klinefelter's syndrome $II$. Sex chromosomal monosomy

$R$. Turner's syndrome $III$. Autosomal trisomy

Column-$I$ (Disorder)	Column-$II$ (Ploidy)
$P$. Down's syndrome	$I$. Sex chromosomal trisomy
$Q$. Klinefelter's syndrome	$II$. Sex chromosomal monosomy
$R$. Turner's syndrome	$III$. Autosomal trisomy

A
$(P-II), (Q-I), (R-III)$
B
$(P-I), (Q-II), (R-III)$
C
$(P-III), (Q-II), (R-I)$
D
$(P-III), (Q-I), (R-II)$

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Class 12 Questions

Class 12

Biology Questions

Chapter

Principles of Inheritance and Variation

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Chromosomal disorders

The condition of sex chromosomes in a male child with Down's syndrome will be:

MediumAIPMT 1991

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Match Column $I$ with Column $II$ and find the correct answer.
Column $I$ Column $II$
$(A)$ Aneuploidy $(i)$ Increase in whole set of chromosomes
$(B)$ Monoploidy $(ii)$ Loss or gain of a chromosome
$(C)$ Polyploidy $(iii)$ Two sets of chromosomes
$(D)$ Diploidy $(iv)$ $A$ single set of chromosomes

Column $I$	Column $II$
$(A)$ Aneuploidy	$(i)$ Increase in whole set of chromosomes
$(B)$ Monoploidy	$(ii)$ Loss or gain of a chromosome
$(C)$ Polyploidy	$(iii)$ Two sets of chromosomes
$(D)$ Diploidy	$(iv)$ $A$ single set of chromosomes

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Identify the disease on the basis of the following characters:
$(1)$ Short stature with a small round head.
$(2)$ Furrowed tongue and partially open mouth.
$(3)$ Palm is broad with a characteristic palm crease.

Medium

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

MediumAIPMT 1991

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$A$ cross between a white-eyed female and a red-eyed male Drosophila gives red-eyed females and white-eyed males. Occasionally,the cross gives white-eyed females and red-eyed males. This is due to:

Difficult

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Match the following columns: Column-$I$ (Disorder) Column-$II$ (Ploidy) $P$. Down's syndrome $I$. Sex chromosomal trisomy $Q$. Klinefelter's syndrome $II$. Sex chromosomal monosomy $R$. Turner's syndrome $III$. Autosomal trisomy

Similar Questions

The condition of sex chromosomes in a male child with Down's syndrome will be:

Match Column $I$ with Column $II$ and find the correct answer.Column $I$Column $II$$(A)$ Aneuploidy$(i)$ Increase in whole set of chromosomes$(B)$ Monoploidy$(ii)$ Loss or gain of a chromosome$(C)$ Polyploidy$(iii)$ Two sets of chromosomes$(D)$ Diploidy$(iv)$ $A$ single set of chromosomes

Identify the disease on the basis of the following characters:$(1)$ Short stature with a small round head.$(2)$ Furrowed tongue and partially open mouth.$(3)$ Palm is broad with a characteristic palm crease.

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

$A$ cross between a white-eyed female and a red-eyed male Drosophila gives red-eyed females and white-eyed males. Occasionally,the cross gives white-eyed females and red-eyed males. This is due to:

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Match the following columns:

Column-$I$ (Disorder) Column-$II$ (Ploidy)

$P$. Down's syndrome $I$. Sex chromosomal trisomy

$Q$. Klinefelter's syndrome $II$. Sex chromosomal monosomy

$R$. Turner's syndrome $III$. Autosomal trisomy

Match Column $I$ with Column $II$ and find the correct answer.
Column $I$ Column $II$
$(A)$ Aneuploidy $(i)$ Increase in whole set of chromosomes
$(B)$ Monoploidy $(ii)$ Loss or gain of a chromosome
$(C)$ Polyploidy $(iii)$ Two sets of chromosomes
$(D)$ Diploidy $(iv)$ $A$ single set of chromosomes

Identify the disease on the basis of the following characters:
$(1)$ Short stature with a small round head.
$(2)$ Furrowed tongue and partially open mouth.
$(3)$ Palm is broad with a characteristic palm crease.