At fertilization, the chromosomes from the father's sperm unite with the chromosomes from the mother's egg, creating a new cell called the

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When the sperm and egg unite, they create a single-celled zygote, which will eventually develop into an embryo. The blastocyst is a later stage of development, and the genome refers to the complete set of genetic instructions in an organism's DNA.

At Fertilization, the Chromosomes from the Father's Sperm Unite with the Chromosomes