BIOL 2050 Chapter Notes - Chapter 6: Frequency-Dependent Selection, Trophy Hunting, Allele Frequency
29 Mar 2016
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Case study: trophy hunting and inadvertent evolution (bighorn sheeps) Population have been reduced by 90% by hunting, habitat loss etc. Trophy hunting is now illegal: they remove the largest and strongest males- they are important for producing offsprings. Human induced evolutionary changes: similarly happening in african elephants, fishing targeting older, larger fish leads to reduction in age and size at which fish mature. Concept 6. 1: evolution viewed as genetic change or descent with modification . Chromosome- a gene carrying structure composed of dna and associated proteins and located in the nucleus. Locus (loci)- gene"s physical location on a chromosome. Gene a discrete unit of heritable information about genetic traits and consists of dna sequences coding for proteins. Allele alternate versions of the same gene (genes can have two or more alleles: alleles are produced by mutations. Central dogma of molecular biology: dna replicates itself, transcribed into, rna and translated into, protein. Genes are made of dna and specify (encodes) proteins.
