The diploid first cell of a new organism is a:

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The diploid first cell of a new organism is a zygote, which results from the fusion of two haploid gametes (sperm and egg) during fertilization. A morula is a stage in embryonic development where the zygote undergoes several rounds of cell division and forms a solid mass of cells. A polar body is a small cell that is produced during oogenesis and does not participate in fertilization. An oogonium is a diploid cell in the ovary that undergoes mitosis and gives rise to primary oocytes.

The Diploid First Cell of a New Organism Is A