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leptotene Line breaks: lepto|tene
Pronunciation: /ˈlɛptə(ʊ)tiːn/

Definition of leptotene in English:


[mass noun] Biology
The first stage of the prophase of meiosis, during which each chromosome becomes visible as two fine threads (chromatids).
Example sentences
  • Early recombination nodules are protein complexes 100 nm in diameter that are associated with forming synaptonemal complexes during leptotene and zygotene of meiosis.
  • Early meiotic stages, leptotene or zygotene, were observed.
  • The bouquet forms at late leptotene and early zygotene and is coincident with chromosome pairing.


Early 20th century: from lepto- 'narrow, fine' + Greek tainia 'band, ribbon'.

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