A chromosome produced by sucessive replication of paired chromosomes, and consisting of up to 1,000 chromatids in parallel register. In the case of the polytene chromosomes within the salivary glands of Drosophila melanogaster (fruit fly), the genes are
Giant chromosomes produced by interphase replication without division, and consisting of many identical chromatids arranged side by side.
A giant chromosome produced by an endomitotic process in which, following synapsis of the two homologues, multiple rounds of replication produce chromatids that remain synapsed together in a haploid number of chromosomes. Large chromosome consisting of many chromatid s formed by rounds of endomitosis following synapsis of the two homologues.
A chromosome packaged from many associated strands of chromatids making it large and easy to discern by light microscopy; found in the salivary glands of fruit-flies.
a giant cablelike chromosome consisting of many identical chromatids lying in parallel
A giant chromosome produced by an endomitotic process in which the multiple DNA sets remain bound in a haploid number of chromosomes.
Insect chromosome consisting of many in-parallel copies of DNA.
To increase cell volume, some specialised cells undergo repeated rounds of DNA replication without cell division (endomitosis), forming a giant polytene chromosome. Polytene chromosomes form when multiple rounds of replication produce chromatids that remain synapsed together in a haploid number of chromosomes. They have characteristic light and dark banding patterns which can be used to identify chromosomal rearragements and deletions.
