CSU FW 104 - Biology and Evolution Review (3 pages)

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FW104 1nd Edition Lecture 3 Outline of Last Lecture II Wildlife Values and Principles A Social Processes B Determine Wise Use Seek to Attain Wise Use By Securing C Wildlife Values a Aesthetic b Economical a Economic Sources b National and Local Economies c Cultural d Societal e Science f Recreational g Negative h Ecological i Education j Ethical D Conservation Funding Services Outline of Current Lecture I Biology Background A DNA B Variation II Why Sex III Speciation Current Lecture I Biology Background A DNA DNA founded by Watson and Crick showed G A C T molecules called bases in a double helix 3 base pairs forms a codon just like a word in a sentence Genes like sentences of codons that spell out how to construct proteins which produce traits Example of a trait is eye color Use chromosomes in which different species have different numbers of pairs Locus position of gene sequence on a chromosome These notes represent a detailed interpretation of the professor s lecture GradeBuddy is best used as a supplement to your own notes not as a substitute Diploid organisms pairs of chromosomes Alleles different versions of same genes and code for different versions of the same trait Example of an allele is blue eyes Homozygous carrier of two of the same alleles Heterozygous carrier of two different alleles Genotype individual s genetic blueprint Phenotype outward appearance B Variation Mutation is the original source of genetic variation change is sequence of DNA Evolution change in genetic composition of a population over time change in allele frequency can lead to new species if isolated Natural Selection environmental factors favor particular inherited traits critical in understand and manage populations idea propose by Charles Darwin Natural Selection is caused by genetic variation over reproduction of offspring struggle for existence and differential survival reproduction doing research do ANYTHING to have little impact on a species and or environment Not all phenotypes