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Modified sperm. The modified sperm now appears as a round body at the opposite pole of the oocyte from the oocyte nucleus, which is now in prophase of meiosis I. Ascaris megalocephala has a diploid number of four; the two pairs of chromosomes appear here as two dark bodies in the nucleus. Since replication of DNA took place during interphase, each chromosome pair consists of four chromatids.



BIOG 1106 - Unit 1 Slides