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Dna Worksheet

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DNA Worksheet
Crystal Noel
SCI/230
25 April 2014
Frederick Carlisle, MS

DNA Worksheet

Answer the following in at least 100 words:

1. Describe the structure of DNA.

* The structure of deoxyribonucleic acid (DNA) contains the biological instructions of making each creature their own unique species. DNA is made up of chemical blocks called nucleotides. These blocks are made up of three parts: a phosphate group, a sugar group, and one of four types of bases (Adenine (A), thymine (T), guanine (G), and cytosine (C)) which is the biological instructions are contained in a strand of DNA (National Human Genome Research Institute, 2012). Each DNA contains instructions to produce protein known as a gene, which size may vary ranging from about 1,000 bases to 1 million bases in bases. DNA is formed in a two-step process in which the enzymes that read the information in a DNA molecules and translated into a messager ribonucleic acid (mRNA).

2. How does an organism’s genotype determine its phenotype?

* An organism’s genotype determines its phenotype by the specific alleles which are alternative forms of the same gene that occupies the same location on a chromosome. There are two alleles (one on each chromosome in the pair) resulting one allele from your mother and one allele from your father. These alleles may be the same or may be different. From the different alleles of a gene serves as the same function but produces phenotypes depending on which set of two alleles you have, such as the color of the eyes, hair, skin color, and so on (Genotype and Phenotype, 2011).

3. Describe each stage of the flow of information starting with DNA and ending with a trait.

“Information will start with the deoxyribonucleic acid (DNA) traveling to the ribonucleic acid (RNA) and into the protein. This information flow will also be followed through the cell

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