The longest phase of spermatogenesis is......

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(B) Spermatogenesis consists of three main phases: the multiplication phase,the growth phase,and the maturation phase.$1$. The multiplication phase in

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Growth phase

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(B) Spermatogenesis consists of three main phases: the multiplication phase,the growth phase,and the maturation phase.$1$. The multiplication phase involves the rapid mitotic division of spermatogonia.$2$. The growth phase involves the accumulation of nutrients and increase in size of the spermatogonia to form primary spermatocytes.$3$. The maturation phase involves meiosis (meiosis-$I$ and meiosis-$II$) to form spermatids.Among these,the growth phase is the longest phase because the spermatogonia must synthesize significant amounts of cytoplasm,proteins,and organelles to prepare for the subsequent meiotic divisions.

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