Vedclass
Class 12BiologyPrinciples of Inheritance and VariationChromosomal disorders
Medium

Who reported that Down's syndrome is due to an extra $21^{st}$ chromosome?

  • A
    $J$.$L$. Down $(1866)$
  • B
    Lejeune $(1959)$
  • C
    Klinefelter $(1942)$
  • D
    Huntington $(1872)$
Share

Explore More

Browse All

Question Bank

12

All Subjects

Class 12 Questions

Class 12

Biology Questions

Chapter

Principles of Inheritance and Variation

Subtopic

Chromosomal disorders

Similar Questions

Monosomy and trisomy can be represented as

Medium
View Solution

In a diploid set of chromosomes,the deletion or addition of a chromosome leads to:

EasyMHT CET 2016
View Solution

In the hexaploid wheat, the haploid $(n)$ and basic $(x)$ numbers of chromosomes are

MediumAIPMT 2007
View Solution

The "cri-du-chat" syndrome is caused by a change in chromosome structure involving:

EasyAIIMS 2005
View Solution

The exchange of chromosomal segments between two non-homologous pairs of chromosomes is known as:

Medium
View Solution

Vedclass Products

For Students

Vedclass Test Series

Mock tests in real JEE/NEET style with performance analysis. 5-day free trial.

Start Free Trial
For Teachers

Exam Paper Generator

Generate Set A/B/C/D exam papers from 7.5L+ questions in 2 minutes. 3 chapters free.

Try Free
For Institutes

Online Exam Module

Live online exams with unlimited students, 360° analytics & white-label branding.

See Demo