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Chromosomes are structures formed by a DNA molecule associated with protein molecules. The human species has 46 of them. There are 4 types: metacentric, submetacentric, acrocentric, telocentric. ______________________________________________________________ Full content from Canal Futura is available on Canais Globo, access here: https://goo.gl/Quh7m5 Find out all about Canal Futura: https://goo.gl/qauKIZ Follow us on Twitter: / canalfutura Like us on Facebook: www.facebook.com/canalfuturaoficial ========================================== Watch on your TV: Sky – 434 HD and 34 Net and Claro TV – 534 HD and 34 Vivo – 68HD and 524 fiber optic Oi TV – 35