Figure Detail. As mentioned, sickle-cell anemia is the result of a change in a single nucleotide, and it represents just one class of mutations called point mutations. Changes in the DNA sequence can also occur at the level of the chromosome, in which large segments of chromosomes are altered.he result is the deletion of a DNA sequence in one chromosome, and the insertion of a DNA sequence in the other chromosome. Â© 2014 Nature Education Adapted from Pierce, Benjamin. Genetics: A Conceptual Approach, 2nd ed.
Also established in 1984, the Texas Division of Southwestern Bell Telephone, with headquarters at Dallas, became one of the largest nongovernmental employers in the state, serving 6.2 million customers in 549 Texas communities.
In 1962, Glen decided that it was time to offer an alternative to the hamburger stands that were saturating the area, so he opened the first Taco Bell and changed his menu to Mexican food. Ten years and hundreds of new taco Bell openings later, the Burrito Supreme hit the menu and became an instant hit. By making this clone version at home, we can reduce the fat to less than one-fifth that of the original. Source: Low Fat Top Secret Recipes by Todd Wilbur.