Home
Class 12
BIOLOGY
Down's syndrome is due to trisomy of 21s...

Down's syndrome is due to trisomy of 21st chromosome caused by

A

Nondisjunction during egg formation

B

Nondisjunction during sperm formation

C

Additon of extra chromosome during mitosis of zygote

D

Either A or B

Text Solution

Verified by Experts

The correct Answer is:
D
Promotional Banner

Topper's Solved these Questions

  • CHROMOSOMAL BASIS OF INHERITANCE

    DINESH PUBLICATION|Exercise Check Your Grasp|45 Videos

  • CHORDATA- PROTOCHORDATA

    DINESH PUBLICATION|Exercise CYG|7 Videos

  • COELENTERATA AND CTENOPHORA (OR CNIDARIA AND ACNIDARIA)

    DINESH PUBLICATION|Exercise CYG|9 Videos

Similar Questions

Explore conceptually related problems

Down syndrome is due to :

Down syndrome is due to :

Trisomy of chromosome 21 causes:

Who reported that Down's syndrome is due to extra 21st chromosome

Read the following five statement five statement (A to E )and select the option with all correct statement : (A) Down's syndrome id due to trisomy of chromosome 22 , (b) Genes are the due of inhetitance ( c) Variation is the degree by which progeny differ from their parents. (d) In chicken ,sex chromosome in male are ZW ,and in females are ZZ (E) Sickle cell anaemia is caused due to change of one base in the gene coding for b-chain of haemoglobin

A human being suffering from Down's syndrome shows trisomy of 21st t chromosome. Mention the cause of this chromosomal abnormality.

Trissomy of 21st chromosome results in

A human being suffering from Down's Syndrome shows trisomy of 21^(st) chromosome. Mention the cause of this chromosomal abnormality.

Down's syndrome is associated with trisomy of chromosome number:

Go through the given genetic disorders (I) Down's syndrome (II) Edward's syndrome (III) Patau's syndrome (IV) Turner's syndrome Which ones are due to trisomy of 21 chromosome?