File:Z3289738 ANAT Lab 2.jpg

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Zygotes showing different distribution of NPB in the 2PN and different PB aligment (Original magnification ×400). Zygotes observed after 18-20 hours after insemination. (A) 2PN centralized and juxtaposed, NPBs aligned on the side of the 2PN, longitudinal PB alignment. (B) 2PN centralized and juxtaposed, NPBs dispersed in the 2PN, perpendicular PB alignment. (C) 2PN centralized and juxtaposed, NPBs non polarized with dispersed or not completely aligned NPBs in the 2PN, longitudinal PB alignment. (D) 2PN centralized and juxtaposed, NPBs aligned on the side of the 2PN, neither longitudinal nor perpendicular PB alignment. Black narrows indicate the PBs. (A) and (B) were examples of zygotes included in Pattern 1 group, while (C) and (D) were examples of zygotes included in Pattern 2 group.

http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2902489/?tool=pubmed

<pubmed>20579351</pubmed>

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