Sentences with phrase «germ cell precursor»
Usually imprinting marks are erased in the germ cell precursor cells and then rewritten in the eggs or sperm.
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In meiosis, a precursor cell — primordial germ cell — produces four spermatozoids during spermatogenesis, while only one oocyte is formed during oogenesis (the other three cells die during the process).
When this mechanism was abolished in female and male germ cells, precursors of eggs and sperm, it had an impact on the flies» fertility.