SFSU Bio 230 Study Guides for Exams 1, 2, 3, and 4 Questions and Answers Grade A+

SFSU Bio 230 Study Guides for Exams 1, 2, 3, and 4 Questions and Answers Grade A+ How are chromosomes, genes, alleles, proteins, traits and mutations related? - ️️ Chromosomes contain DNA which contains genes that can vary and are then called alleles, which code for proteins that can be expressed as traits. Mutations happen. What causes cancer?Are all mutations caused by mutagens? - ️️ Cancer can be caused by inheritance or sporadic mutations (mutagens). Not all mutations are caused by mutagens. ** How do you go about determining whether the causes of cancer are primarily genetic (inherited) or acquired (environmental)? Where in the body are inherited mutations found/which cells must carry a mutation in order for it to be passed on to offspring? What are the roles of newly-acquired mutations and inherited mutations in tumor progression? - ️️ You can determine what caused the mutation by looking at the cells in which the mutation is found. Inherited mutations are found in all cells, and can be passed on (since found in gametes). Acquired mutations occur at the site of mutation. In what ways are gametes and somatic cells different? - ️️ Somatic cells are diploid (46 chromosomes, 23 pairs). Gametes are Haploid (23 unpaired chromosomes). What causes cancer? If someone said to you that cancer is disease of stem cells, would you agree with them? Why or why not? - ️️ Mutations cause uncontrolled mitosis