Kensey H. Barrett South University BIO3344-Principles of Genetics SU01 Week 1 Di

Kensey H. Barrett South University BIO3344-Principles of Genetics SU01 Week 1 Discussion Professor Dr. Hoban September 23 2021 If you were asked to get a genetic test panel performed which diseases or health risk would you be interested in learning about and why? As a 35-year-old female with family history of cystic fibrosis hypertension and heart disease who is not interested in having more children I would want to check for these types of health risk. Doing a Nutrigenetics testing would be interesting to see how that plays a role in daily activities and food intake (Lewis 2020 p. 421). Knowing what a possibility is genetically of having such as osteoporosis hypertension type 2 diabetes or heart disease could help motivate for prevention (Lewis 2020 p. 420). Listing cystic fibrosis my curiosity is because I know my mother and father are both carriers. I have two children and one have asthma like symptoms constantly. I chose to not be tested while pregnant and now I wonder if it is possible for him. However it would have to be my husband and I both having the gene for CF. While it could be a coincidence I often wonder about getting genetic testing for that reason. Describe the biochemical composition structure and replication of DNA. Detail the role of specific RNAs in the process of protein transcription and translation. The biochemical composition of the DNA is that DNA is deoxyribonucleic acid that can be located in chromosomes. It is the house of inherited information that is made up of nucleotides and it makes genes (Lewis 2020 p. 168). DNA is a double helix that has a phosphate group deoxyribose and a base. It has four bases which are Adenine (A) Thymine (T) Guanine (G) and Cytosine (C) (Lewis 2020 p. 168). The structure of DNA began in 1909 when Russian-American biochemist Pheobus Levene found the 5-carbon sugar ribose as part of some nucleic acids (Lewis 2020 p. 168). Then in 1929 he discovered a similar sugar deoxyribose in other nuclei acids. In the early 1950s two lines of experimental evidence converged to connecting the dots that finally revealed the full DNA structure (Lewis 2020 p. 168). The replication of DNA happens when it is copied so that the information can be maintained and passed to future cell generations. DNA replication happens during S phase of the cell cycle (Lewis 2020 p. 174). It first unwinds and then separates. The hydrogen bonding that holds the base pairs together break and two identical nucleotide chains are built from one (Lewis 2020 p. 174). This is the new complementary pairs. The role of specific RNA is in the process of protein transcription and translation starts with cells using two process to manufacture proteins using genetic instructions. Transcription first synthesizes RNA molecule that is complementary to one strand of the DNA double helix for a gene (Lewis 2020 p. 174). The RNA copy is taken from the nucleus and into the cytoplasm. The process of translation takes the information in the RNA to manufacture a protein by aligning and joining the amino acids. Then the protein folds into a three-dimensional form for its function (Lewis 2020 p. 174). Describe in detail one of the processes of cell survival. Describe how an abnormality in one of these cell functions causes cancer. All of the genes that mutations increase susceptibility to or cause cancer affect three basic cellular pathways which is cell fate cell survival and genome maintenance (Lewis 2020 p. 374). Cell fate is the differentiation or specialization. Cell survival is the oxygen availability and preventing apoptosis. Genome maintenance refers to the abilities to survive in the presence of reactive oxygen species and toxins to repair DNA to maintain chromosome structure and to correctly splice mRNA molecules (Lewis 2020 p. 374). A cancer cell has a different look than a normal cell. Cancer cells can be rounder than the cells they descend from because they do not conform to surrounding normal cells as strongly as other cells do (Lewis 2020 p. 377). Their plasma membrane is more fluid different substances cross it. A cancer cells may have different antigens that are on other cells or different numbers of the antigens that are also on normal cells (Lewis 2020 p. 377). Mitosis is similar to a runaway train that is racing along without signals or controls this is the red flag. Cancer starts when a cell divides more frequently than noncancerous cells that is comes from (Lewis 2020 p. 375). The timing rate and number of mitoses a cell undergoes will depend on protein growth factors the transcription factors from within and signaling molecules from outside the cell. Cancer cells arise more quickly because mitoses are frequent (Lewis 2020 p. 375). However the immune system steps in to destroy cancer cells after recognizing tumor-specific antigens on their surfaces. The checkpoints that control the cell cycle can reveal how the cancer started (Lewis 2020 p. 375). A mutation in a gene that normally halts the cell cycle can lift the constraint leading to inappropriate mitosis. The failure to halt long enough to repair DNA can allow a mutation in an oncogene or tumor suppressor gene to persist. This loss of control can contribute to cancer by affecting the cell cycle (Lewis 2020 p. 375). Reference Lewis R. (2020). Human Genetics (13th Edition). McGraw-Hill Higher Education (US).

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