2. sequence of a gene that can be passed on. It can be a change in genetic information, addition of information, or deletion of information. A mutation is a permanent change in the

3. A mutation can improve someone's lifestyle or permanently destroy it. A Nebraska family has a genetic mutation that increases bone mass formation. This breaks down to a point in mutation in a family’s DNA causing increased bone density. The family members that have this mutation are far less likely to break a bone then the normal population.

4. Mutations in the body can cause permanent damage. For example, mutations can cause numerous cancer cells creating a tumor. Mutations can also create extra limbs. This deer had a genetic mutation causing it to have extra legs. Mutations can also occur when government official run nuclear tests that cause deformity.

5. The nucleotides of DNA are joined together by covalent bonds between the phosphate of one nucleotide and the sugar of another one, creating a phosphate sugar backbone with the nitrogenous bases extending from this backbone like the teeth of a comb.

6. In all living things, DNA exists as a double-stranded molecule with the bases from each strand attracted to each other in hydrogen bonds. The hydrogen bonding also twists the phosphate deoxyribose backbones into a twisted ladder shape.

7. 1.Nucleotides: any of a group of molecules that, when linked together, form the building blocks of DNA or RNA 2.Covalent Bonds: the bond formed by the sharing of a pair of electrons by two atoms 3.Phosphate: a salt of phosphoric acid 4.Phosphoric acid: an acid used in fertilizers and soaps