wiz-icon
MyQuestionIcon
MyQuestionIcon
15
You visited us 15 times! Enjoying our articles? Unlock Full Access!
Question

How many statements are correct regarding non-disjunction of chromosomes?


A
3
No worries! We‘ve got your back. Try BYJU‘S free classes today!
B
4
No worries! We‘ve got your back. Try BYJU‘S free classes today!
C
2
No worries! We‘ve got your back. Try BYJU‘S free classes today!
D
1
Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses
Open in App
Solution

The correct option is D 1

Only statement iii is correct.

Chrosomes get distributed in the Anaphase stage of cell division. Non-disjunction happens at the chromosomal level. Non–disjunction is the process in which paired chromosomes fail to move to opposite poles during the Anaphase I stage of Meiosis.

Non-disjunction of chromosomes leads to the non-separation of homologous chromosomes and thus one cell will be having an extra chromosome while another a chromosome less. Thus non-disjunction changes the ploidy of cells.

Usually chromosomes get distributed equally in organisms; non–disjunction happens rarely, in certain specific conditions like old age.


flag
Suggest Corrections
thumbs-up
0
Join BYJU'S Learning Program
Join BYJU'S Learning Program
CrossIcon