Final answer:
During spermatogenesis in Drosophila, a cell called a spermatogonium undergoes mitosis and then meiosis to eventually produce 64 sperm cells. Each primary spermatocyte after two rounds of meiosis followed by subsequent mitosis results in numerous sperm, all equipped with a head containing DNA, a midpiece rich in mitochondria, and a flagellar tail for mobility.
Step-by-step explanation:
In Drosophila, a type of fruit fly, spermatogenesis is the process by which sperm cells are formed. Starting with a diploid cell called a spermatogonium, this cell undergoes mitosis to produce two identical diploid cells. One remains as a spermatogonium, while the other becomes a primary spermatocyte that undergoes DNA replication in preparation for meiosis. The primary spermatocyte then enters meiosis I, leading to two haploid secondary spermatocytes. Each secondary spermatocyte subsequently undergoes meiosis II to produce two haploid spermatids. Unlike the typical mammalian process of spermatogenesis where four sperm cells are produced from each primary spermatocyte as in humans, Drosophila spermatogenesis differs in that each cycle of meiosis and subsequent rounds of mitosis eventually result in 64 sperm cells from a single primary spermatocyte.
The head of the sperm contains the genetic material, vital for fertilization. The midpiece is packed with mitochondria, supplying the energy needed for the sperm to swim, while the flagellar tail propels the sperm cell forward. The process of spermatogenesis in Drosophila thus concludes with the formation of numerous functional sperm, all equipped for successful reproduction.