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High School Biology Department: Open Classes on "meiosis"

March 24, 2025

On the afternoon of March 20, Ms. Chen Shijia of the High School Biology department conducted an open class themed "Meiosis" in B105 of Zhongxing Building, attracting several biology teachers to attend and inspect.


Meiosis is an essential process during the formation of gametes and has great significance to the reproduction and continuation of species. Understanding the process of meiosis requires students to form a comprehensive understanding of an abstract concept - "homologous chromosomes." Meanwhile, this process is closely related to Mendelian inheritance principles. Therefore, the process of meiosis is always a key point and challenging content in high school biology education.


At the beginning of the class, Ms. Chen led the students to review the concepts of DNA and chromosomes, guiding them to think about the number and structure of chromosomes in various organisms. By observing chromosome maps of different organisms, many students noticed that chromosomes in living organisms mostly exist in pairs. The chromosomes of the same length and gene order are called homologous chromosomes. Ms. Chen then explained the concepts of diploid and haploid to deepen students' understanding of chromosome sets, which prepares for the introduction of meiosis phases.




After the introduction of the entire process of meiosis, Ms. Chen divided the students into groups of four. Students are required to use paper plates and pipe cleaners to construct models of the two cell divisions involved in meiosis, a total of eight stages. Through discussion and collaboration, students used paper plates to represent the cell bodies and pipe cleaners to simulate the different behaviors of chromosomes. Finally, the students finished the construction of models for each stage of meiosis. Once the models were completed, Ms. Chen took the opportunity to prompt the students to actively think about the connection between meiosis and Mendelian inheritance principles. Students reviewed Mendel’s conclusion, attempting to correspond them with the stages of meiosis, and analyzed chromosome behaviors during meiosis that lead to the segregation and independent assortment of alleles through discussion.



Ms. Chen's gentle guidance encouraged students to actively participate in classroom activities and discussions, allowing them to gradually perceive the joy of learning biology. Teachers and students present benefited greatly and gained a wealth of knowledge from this open class.


(Written by Xiao Deng  Pictures by Feifan Zhang, Shijia Chen  Edited by Cody Turner   Reviewed by Qian Zuo)