Class 12 Biology Principles of Inheritance and Variation Chromosomal disorders

Easy

Edward syndrome is on account of .......

A
$45$ chromosomes instead of $46$
B
Presence of three chromosomes on $18^{th}$ pair of autosome
C
Presence of three chromosomes on $21^{st}$ pair of autosome
D
Presence of three pair of sex chromosomes

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Class 12 Questions

Class 12

Biology Questions

Chapter

Principles of Inheritance and Variation

Subtopic

Chromosomal disorders

Similar Questions

Describe chromosomal disorders and provide examples.

Medium

Down syndrome is caused by an extra chromosome in the $21$st pair. What percentage of offspring from an affected mother and a normal father will show the effect of this disorder (in $\%$)?

MediumAIPMT 2003

Which of the following is an example of a non-Mendelian disorder?

Define aneuploidy. How is it different from polyploidy? Describe the individuals having the following chromosomal abnormalities:
$(a)$ Trisomy of $21^{st}$ chromosome
$(b)$ $XXY$
$(c)$ $XO$

Medium

Which of the following disorders is related to the karyotype given below?

Medium

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