part_of part of part of results in growth of primary spermatocyte developmental process involved in reproduction spermatogenesis primary spermatocyte growth GO:0007285 The phase of growth and gene expression that male germ cells undergo as they enter the spermatocyte stage. The cells grow in volume and transcribe most of the gene products needed for the morphological events that follow meiosis. biological_process cellular process involved in reproduction in multicellular organism growth developmental cell growth