So far as we know polytene chromosomes have been previously observed only as typical structures in the salivary gland cells of Diptera, and in certain plant cells. By using orcein we have been able to ...

Sengün, A., Rev. Fac. Sci. Univ. Istanbul, B, 13 (1947). Kosswig, C., and Sengün, A., Rev. Fac. Sci. Univ. Istanbul, B, 13 (1947). Kosswig, C., and Sengün, A., C.R ...

For at least the last 10 million years every yeast cell of the sort used to make beer or bread has had 16 chromosomes. But now—thanks to CRISPR technology and some DNA tinkerers in China—there are ...

Complex organisms have complex genomes. While bacteria and archaea keep all of their genes on a single loop of DNA, humans scatter them across 23 large DNA molecules called chromosomes; chromosome ...

Researchers have discovered the largest known avian sex chromosome. The giant chromosome was created when four chromosomes fused together into one, and has been found in two species of lark.

Researchers have completed and released a chromosome-scale genome sequence of the Aldabra giant tortoise providing a much needed genetic resource for rescue efforts The Aldabra giant tortoise is one ...

This is a preview. Log in through your library . Abstract The base composition of RNA from individually isolated giant chromosomes, puffed chromosome segments, nucleoli, and samples of cytoplasm from ...

Deep in coastal mangroves and even inside our own mouths, biologists are finding that DNA does not always sit in a simple loop at the cell’s center. A giant microbe called Thiovulum imperiosus has now ...

Like the electron, the gene has eluded the eye of Science while manifesting itself by its works. “Gene” is the name by which geneticists agreed to call the mysterious heredity-transmitting agents ...

Chromosome Puffs These enlarged regions on the giant chromosomes found in some insect cells have been shown to be active genes. They probably produce the nucleic acid that translates the genetic ...

Chromosomes are thread-like structures comprising DNA that are present inside the nucleus of every cell in the body. Specific segments of DNA are called genes. Every chromosome contains many genes, ...