Q. Polytene chromosomes in salivary glands of $Drosophila$ are formed as a result of
A) Endoduplication
B) Duplication without separation
C) Replication of DNA without cell division
D) All of the above
Explanation
The numerous strands of polytene chromosomes are produced but to repeated replication of the paired chromosomes without any cell division (endoduplication) so, that the number of strands in a chromosomes doubles after every round of DNA replication.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.