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[mass noun] The first stage of the prophase of meiosis, during which each chromosome becomes visible as two fine threads (chromatids).
- ‘Early meiotic stages, leptotene or zygotene, were observed.’
- ‘The bouquet forms at late leptotene and early zygotene and is coincident with chromosome pairing.’
- ‘Early recombination nodules are protein complexes 100 nm in diameter that are associated with forming synaptonemal complexes during leptotene and zygotene of meiosis.’
- ‘That association presumably assists in pairing and is later lost during leptotene and replaced with a loose bouquet formation in zygotene.’
Early 20th century: from lepto- ‘narrow, fine’ + Greek tainia band, ribbon.
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