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How do chromosomes divide?

In a body, every single cell has the same number of chromosomes. This is because when a cell divides, the replicated chromatids are equally segregated into daughter cells. But, the first meiotic division is a clear exception. This division segregates maternal and paternal chromosomes for production of eggs and sperms, which are the origin of a new life. What is the story behind this division?

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animation of chromosome segregation


News

20 October, 2026

EMBO Workshop on the Cell Cycle

At EMBO Workshop on the Cell Cycle: Exploring Conservation and Divergence in Life’s Engine, held in Lisbon, Portugal from October 5 to 7, 2026, Tomoya Kitajima delivered an invited lecture.

20 October, 2026

FASEB SRC Consequences of Aneuploidy

At FASEB SRC Consequences of Aneuploidy, held in Melbourne, USA from September 28 to October 1, 2026, Tomoya Kitajima delivered an invited lecture.

20 October, 2026

NIH-NHLBI CDBC Seminar

At the NIH-NHLBI CDBC Seminar, held in Bethesda, USA, on September 23, 2026, Tomoya Kitajima delivered an invited lecture.

1 October, 2026

The 119th SRD Meeting

Remi Kanemura and Emiko Ichihara attended the 119th SRD Meeting held in Morioka from September 24 to 26, 2026 and presented their researches.

11 September, 2026

RIKEN Summer School

MeiAkiko Mukose and Tae Akizuki attended RIKEN Summer School 2026 held in Wako from September 10 to 11, 2026 and presented their researches. Tae won the poster award. Congratulations!

11 September, 2026

NIBS

At the 3rd Mini-Symposium on Early Embryology hosted by National Institute of Biological Sciences（NIBS), held in Beijing, China, on September 8, 2026, Tomoya Kitajima delivered an invited lecture.

4 September, 2026

S-HIGO Cutting-Edge Seminar

At the S-HIGO Cutting-Edge Seminar at Kumamoto University, held in Kumamoto on September 2, 2026, Tomoya Kitajima delivered an invited lecture.






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