DNA & Chromosomes. DNA Model DNA can be compared to a ladder that is twisted into a continuous spiral shape known as a double helix Each step contains.

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DNA & Chromosomes

DNA Model DNA can be compared to a ladder that is twisted into a continuous spiral shape known as a double helix Each step contains pairs of chemicals Adenine and Thymine pair together Guanine and Cytosine pair together our_chromosome.html our_chromosome.html

Gene A gene is thought to be a interrupted segment of DNA that contains coded instructions for specific traits. Genes come in pairs and each possible version of a gene is called a allele

Videos Heredity traits/tour_heredity.html traits/tour_heredity.html Traits traits/tour_trait.html traits/tour_trait.html