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Script: Kana tichitevera Biology, "munhu anotanga kusikwa panosangana murume nemukadzi" kana murume nemukadzi vasanganisa nhengo dzavo, uyu makumi maviri ane nhatu dzinonzi ma chromosomes pavanosangana zvinoita kuti vatange kusika mumhu. | ||
All ages referenced to fertilization, not last menstrual period. |