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Mitosis and Meiosis

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Questions and Answers

¿Qué es la mitosis?

Es cuando una célula se divide para formar 2 células idénticas.

Flashcards

Zona pellucida

The zona pellucida is a glycoprotein layer surrounding the plasma membrane of mammalian oocytes.

Fertilization

Fertilization (or conception) is the fusion of gametes to initiate the development of a new individual organism.

Fertilization defined

Is the union of an egg and sperm, normally occurring in the ampulla of the fallopian tube.

Fertilization process

When the sperm enters the egg, it increases intracellular Ca2+ concentrations. This causes the egg to complete meiosis II, and results in the formation of a pronucleus.

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Sperm's Role in Fertilization

Fertilization involves a sperm swimming through the corona radiata and binding to the zona pellucida.

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Study Notes

Meiosis allows for the production of cells with half the number of chromosomes.
Meiosis is important for variation.
Mitosis allows for the maintenance of the number of chromosomes.
Mitosis is important for cell division.

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