polytene chromosome

[pol-ee-teen]
noun Genetics.
  1. a giant, cross-banded chromosome that results from multiple replication of its genetic material with the duplicated chromatin strands remaining closely associated.

Origin of polytene chromosome

First recorded in 1970–75; poly- + -tene
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018