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. 2019 Jan 3;5:1. doi: 10.1186/s40851-018-0113-z

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© The Author(s). 2019

Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.

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Fig. 11 — Male germ cells and chromosomes (orcein; PhC). a Testis with spermatids (arrowheads) and spermatozoa (arrows) of a male from Passo Ballino. b Bivalents in an oocyte of a female from Passo Ballino. c 18 univalents in an oocyte of a female from Rocchetta. d Bivalents in an oocyte of a female from Ospitaletto A. e Univalents in an oocyte of a female from Ospitaletto B. Bars = 10 μm