Meiosis is the generation of germ cells (eggs and sperm). In meiosis, DNA replication is followed by two division cycles: meiosis I, which segregates homologous chromosomes and meiosis II, which ...

Oogenesis is the development of the mature female germ cells called egg cells or ova. Primordial germ cells, the founder cells of the germ line, develop through several immature stages by undergoing ...

Disney has released the posters of its remake of Beauty and the Beast – and they've had a rapturous reception. They feature character portraits of the film's stars, Emma Watson and Dan Stevens, and ...

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Arteries carry oxygenated blood away from your heart. They have thick walls and a muscular layer that keeps your blood moving. Arteries can be as wide as a nickel (about two centimeters). They are the ...