BIOL 133 Exam 2 Questions With Complete Solutions.

Gene Determination correct answer: the idea that our genes solely determine who we are example: Huntingdon's disease, and sickle cell anemia both depend on genes did do genes determine everything? correct answer: NO, - alcoholism is not determined by genes complex traits = ? correct answer: Mendelian trais - complex traits do not follow a simple mendelian pattern of inheritance Mendelian traits correct answer: characteristics that are influenced by alleles at only one genetic locus - traits due to single gene - "either/or" pattern of inheritance example: pea plants : purple or white people : huntingtons disease or not Two girls are twins but different hair & skin color, why? correct answer: results of meiosis mixing parents genes around to create new combinations what two factors are responsible for variation in organisms? correct answer: 1. Genes 2. Environment multifactorial traits correct answer: traits influenced by environment polygenic traits correct answer: due to activity of 1 gene - continuously varying - bell curve distribution of phenotypes what trait is a mendelian trait? correct answer: stem color because there are only two options how many genes are involved in determining height in humans? correct answer: 400, polygenic, multifactorial trait Quantitative Traits correct answer: - phenotypes that vary i