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

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(C) $Down's$ syndrome is a chromosomal disorder caused by the presence of an additional copy of chromosome number $21$ ($trisomy$ $21$).This condition occurs due to the failure of homologous chromosomes to separate during meiosis,a process known as non-disjunction.As a result,one gamete receives an extra chromosome,and upon fertilization,the zygote develops the $trisomic$ condition.

Class 12 Biology Principles of Inheritance and Variation Chromosomal disorders

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

AIPMT 1991 All AIPMT

A
Triploidy
B
Translocation
C
Non-disjunction
D
Dicentric bridge formation

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Class 12

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Principles of Inheritance and Variation

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Chromosomal disorders

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AIPMT 1991 Paper All AIPMT years →

$A$ human with $45$ chromosomes having only one $X$ chromosome $(XO)$ suffers from which of the following disorders?

MediumAIPMT 1992

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Symptoms representing a particular disease due to chromosomal abnormalities are referred to as:

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Give examples of disorders caused by sex chromosomal abnormalities and describe them briefly.

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MediumAIPMT 2008

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In humans,mental retardation is associated with sex-linked abnormalities. It is generally due to:

MediumAIPMT 1998

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

Similar Questions

$A$ human with $45$ chromosomes having only one $X$ chromosome $(XO)$ suffers from which of the following disorders?

Symptoms representing a particular disease due to chromosomal abnormalities are referred to as:

Give examples of disorders caused by sex chromosomal abnormalities and describe them briefly.

Which one of the following conditions in humans is correctly matched with its chromosomal abnormality/linkage?

In humans,mental retardation is associated with sex-linked abnormalities. It is generally due to:

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