2-cell embryos, light micrograph

2-cell embryos, light micrograph

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Caption: 2-cell embryos. Light micrograph of two 2-cell embryos. The development of an embryo is called embryogenesis. In organisms that reproduce sexually, once a sperm fertilizes an egg cell, the result is a cell that has all the DNA (deoxyribonucleic acid) of the two parents (zygote). The zygote begins to divide by mitosis producing 2, 4, 6, 8 cells and so on, to form a multicellular organism. The zygote is called an embryo from the first cell division (seen here), up until the end of the 8th week, whereafter it is instead called a foetus.

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Keywords: 2, 2-cell, 2-cells, beginning, biological, biology, cell, cell biology, cell division, cells, cytology, developing, development, developmental biology, diploid eukaryote, duo, embryo, embryo-genesis, embryogenesis, embryology, embryos, human, human body, laboratory, life, light micrograph, light microscope, lm, mitosis, mitotic, multicellular organism, origin, pair, reproduction, stage, start, two

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