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Published byLynette Murphy Modified over 6 years ago
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Cell Reproduction 8.1 (p. 145-146)
DNA = deoxyribonucleic acid, a long thin molecule that contains genetic information Instructions for how to build all of the parts (proteins) that make you DNA is coiled and packed tightly together into structures called chromosomes Has a famous “double helix” shape (like a spiral staircase or twisted ladder)
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Cell Reproduction 8.1 (p. 145-146)
Chromosomes = rod-shaped structures of made of DNA and proteins Chromosomes held together in pairs Looks like 2 socks tied together Each half of chromosome is called a chromatid Each chromatid is an identical copy of the other
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Cell Reproduction 8.1 (p. 145-146)
Centromere = “knot” or part that holds the 2 chromatids together The centromere loosens and the chromatids separate during cell division Each new cell receives one of the chromatids
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Cell Reproduction 8.1 (p. 145-146)
Histones = proteins that the DNA wraps around to help it hold its shape Like wrapping Christmas lights around a tube so they don’t get tangled
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Cell Reproduction 8.1 (p. 145-146)
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Cell Reproduction 8.1 (p. 145-146)
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Cell Reproduction 8.1 (p. 145-146)
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