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My name is Poon Cheng Moh. I have been teaching biology in SMK(P) Raja Zarina, Port Klang for 26 years. I sincerely hope that this blog on SPM Biology will be useful to both teachers and students.

Thursday, July 4, 2013

When chromosomes fail to separate

Example of Meiotic Nondisjunction that causes disease like Down Syndrome

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