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  2. Xenopus egg extract - Wikipedia

    en.wikipedia.org/wiki/Xenopus_egg_extract

    The first frog egg extract was reported in 1983 by Lohka and Masui. [1] This pioneering work used eggs of the Northern leopard frog Rana pipiens to prepare an extract. Later, the same procedure was applied to eggs of Xenopus laevis, becoming popular for studying cell cycle progression and cell cycle-dependent cellular events. [2]

  3. Oogenesis - Wikipedia

    en.wikipedia.org/wiki/Oogenesis

    In the brown alga Fucus, all four egg cells survive oogenesis, which is an exception to the rule that generally only one product of female meiosis survives to maturity. In plants, oogenesis occurs inside the female gametophyte via mitosis. In many plants such as bryophytes, ferns, and gymnosperms, egg cells are formed in archegonia.

  4. Oocyte activation - Wikipedia

    en.wikipedia.org/wiki/Oocyte_activation

    Oocyte (or ovum/egg) activation is a series of processes that occur in the oocyte during fertilization. Sperm entry causes calcium release into the oocyte. In mammals, this is caused by the introduction of phospholipase C isoform zeta (PLCζ) from the sperm cytoplasm. [ 1 ]

  5. Somatic cell nuclear transfer - Wikipedia

    en.wikipedia.org/wiki/Somatic_cell_nuclear_transfer

    After the somatic cell transfers, the cytoplasmic factors affect the nucleus to become a zygote. The blastocyst stage is developed by the egg to help create embryonic stem cells from the inner cell mass of the blastocyst. [3] The first mammal to be developed by this technique was Dolly the sheep, in 1996. [4]

  6. Students turn a regular egg into a baby chick in mind ... - AOL

    www.aol.com/news/2016-06-08-students-turn-a...

    While the video claims that this is the first time in history this experiment has been done, The Daily Mail says that a similar process was outlined in a chapter of a US biology textbook from 1993.

  7. Glossary of cellular and molecular biology (0–L) - Wikipedia

    en.wikipedia.org/wiki/Glossary_of_cellular_and...

    3' untranslated region (3'-UTR). Also three-prime untranslated region, 3' non-translated region (3'-NTR), and trailer sequence.. 3'-end. Also three-prime end.. One of two ends of a single linear strand of DNA or RNA, specifically the end at which the chain of nucleotides terminates at the third carbon atom in the furanose ring of deoxyribose or ribose (i.e. the terminus at which the 3' carbon ...

  8. Chromosomal crossover - Wikipedia

    en.wikipedia.org/wiki/Chromosomal_crossover

    Crossing over occurs between prophase I and metaphase I and is the process where two homologous non-sister chromatids pair up with each other and exchange different segments of genetic material to form two recombinant chromosome sister chromatids. It can also happen during mitotic division, [1] which may

  9. Polar body - Wikipedia

    en.wikipedia.org/wiki/Polar_body

    The common names "polocytes" and "polar bodies" derive from their polar position in the eggs. [1] Polar bodies were characterized in the early 20th century, by O. Hertwig, T. Boveri, and E.L. Mark, as non-functioning egg cells which disintegrated because the spermatozoon , with rare exceptions, could not fertilize them and instead chemically ...