zygotene

Term: zygotene

Literally meaning: “yoked bands”

Origin: Anc Greek

ζυγός/zygos(=yoke, doubled)

ταινία/taenia(=band, ribon)> τανύω/tanyo(=strain)

Coined/History

by V Gregoire (1907)

Definition

Zygotene is one of the stages of prophase I in which the homologous chromosomes are associating side by side.

Term: diplotene

Literally meaning: “double bands”

Origin: Anc Greek

διπλός/diplos( =duplex) > δι-/di-(=prefix meaning twice) > δις/dis(=two, double)

ταινία/taenia(=band, ribon)> τανύω/tanyo(=strain)

Coined/History

In 1912 by The Belgian cytologist and gynecologist Hans von Winiwarter (1875-1949) who had an interest in the nature of gender determination, reported from his studies of fetal ovaries that the human diploid chromosome number was probably 48.

Definition

Diplotene is one of the stages of prophase I in which each homologous chromosome pair have separated from one another except at chiasmata.

Term: diakinesis

Literally meaning: “double bands”

Origin: Anc Greek

δια-/dia(=apart)

κίνησις/kinesis(=movement)

Coined/History

by Häcker (1897

Definition

Diakinesis is one of the stages of prophase I in which the chromosomes are well separated from one another. This stage is recognized by the highly condensed condition of the chromosomes, the homologous pair of which are held together by chiasmata.