A stretch of densely packed chromatin along the polytene chromosome, visible as a morphologically distinct band.

A stretch of less tightly packed chromatin along the polytene chromosome, found between bands.

A thread-like connection joining two regions of ectopically paired polytene chromosomes.

OBSOLETE. A chromosome found in the cell during interphase of the cell cycle. Chromosomes are usually decondensed during interphase and each long DNA molecule in a chromosome is divided into a large number of discrete domains that are folded differently.

OBSOLETE. A chromosome involved in the process of mitosis.

OBSOLETE. A chromosome found in the cell during prophase.

OBSOLETE. A chromosome found in the cell during metaphase. Typically, sister chromatids are held together at their centromeres and chromosomes are covered with a large number of molecules, including ribonucleoproteins.

OBSOLETE. A chromosome involved in the process of meiosis.

A connection formed between chromatids, visible during meiosis, thought to be the point of the interchange involved in crossing-over.

An electron dense structure that is associated with meiotic chromosomes.

An electron dense structure that is associated with meiotic chromosomes in leptotene or zygotene during meiosis I.

An electron dense structure that is associated with meiotic chromosomes in pachytene during meiosis I.

Heterochromatin that is located adjacent to the CENP-A rich centromere 'central core' and characterized by methylated H3 histone at lysine 9 (H3K9me2/H3K9me3).

A diffusely banded region of heterochromatin located between euchromatin and alpha-heterochromatin in the polytene chromosome chromocenter; normally replicated during polytenization.

A small, compact region of heterochromatin located in the middle of the polytene chromosome chromocenter, which undergoes little or no replication during polytenization.