Polytene chromosomes of Drosophila salivary glands each consist of multiple identical DNA strands that are aligned in parallel structures. How could these arise?
A) replication followed by mitosis
B) replication without separation
C) meiosis followed by mitosis
D) fertilization by multiple sperm
E) special association with histone proteins

Question

Quizplus · Accepted Answer

Polytene chromosomes are formed through a process called endoreplication, in which DNA replication occurs without cell division. This leads to multiple identical copies of DNA strands that are aligned in parallel structures.

Polytene Chromosomes of Drosophila Salivary Glands Each Consist of Multiple