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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

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.

8 July, 2026

Paper Celebration

We held a lab party to celebrate the publication of papers by Eishi Aizawa, So Shimamoto, and Hirohisa Kyogoku.

12 June, 2026

The 59th Annual Meeting of the Japanese Society of Developmental Biologists

At the 59th Annual Meeting of the Japanese Society of Developmental Biologists, held in Hiroshima, from June 9 to 12, 2026, Tomoya Kitajima delivered an invited lecture.

9 June, 2026

International Symposium on Chromosome Dynamics

Miho Sakuma attended International Symposium on Chromosome Dynamics：from Structure to Cellular Function, held in Awaji Island, from 31 May to 3 June, 2026 and gave a poster presentation.

15 May, 2026

MAYosis2026

At MAYosis2026 2026, held online on May 12, 2026, Tomoya Kitajima delivered an invited lecture.





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