Study Guide For Exam I
Study Guide For Exam I Fw 104
Popular in Wildlife Ecology and Conservation (GT-SC2)
Popular in Animal Science and Zoology
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This 3 page Study Guide was uploaded by Courtney Potter on Friday September 18, 2015. The Study Guide belongs to Fw 104 at Colorado State University taught by Nicole K M Vieira; Ann L Randall ; Tyler Ryde Swarr in Summer 2015. Since its upload, it has received 73 views. For similar materials see Wildlife Ecology and Conservation (GT-SC2) in Animal Science and Zoology at Colorado State University.
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Date Created: 09/18/15
Biology Background DNA 0 Genetic code or blueprint that uses 4 types of molecules called bases ATGC o A series of three base pairs form a codon which is like a quotwordquot in a sentence that codes for a gene Genes use codons to say how to produce proteins like sentences DNA found in chromosomes of cell 0 Different organisms have different numbers of chromosomes Locus position of gene sequence on chromosome Alleles different versions of same gene code for different version of trait o Heterozygous traits different alleles from parents 0 Homozygous traitssame alleles from parents Genotypeindividual genetic blueprint Phenotype trait exerted on the outside of an organism o Genotype different but can still have the same phenotype due to dominant and recessive traits 0 Animals can also have the same genotype but a different phenotype because you have to take into account the environment also affects phenotypes Genotypic variation differences in genetic makeup Phenotypic variation differences in morphological physiological and behaviors in animals Mutation 0 Change in sequence of base pairs 0 Radiation chemicals replication errors etc 0 Important for evolution Evolution change in genetic composition of a population in a period can lead to new species 0 Natural Selection environment limits which genes get passed on 1 Genetic Variation advantageous genes are the ones that get passed on 2 Overproduction of Offspringproduce more offspring than can survive 3 Struggle for existence competition for food space and mates 4 Differential Survival and Reproduction 0 Sex creates new allele combinations Recombination during meiosis from chromosomal segments from diploid to haploid Randomly creates genotypes that may be less adapted to the environment Asexual reproduction keeps successful genotypes intact No variation can lead to diseases killing off species Costly in energy and time Adult has to develop by fertilized egg 0 Red Queen Hypothesis in order to keep up as a species species must constantly evolve Cost And Curiosity of Animal Orientation Ornaments advertise tness and genes to potential mates Courtship males compete females choose mate 0 Sexual selection is a form of natural selection Loss of Genetic Variation 0 Genetic Drift random chance in allele frequencies in smaller populations lnbreeding lose recessive traits Small populationsendangered species are at a huge risk Speciation new species produced by environment changing 0 Example Chimps and Bonobos look alike and eat the same food and live in the same environment but chimps are aggressive because they compete with apes on the ground for food bonobos are more peaceful because they have little competition for resources Evolution Is Important 0 Survival adaptation 0 Diversity Northern Elephant Seas Are An Example 0 Population genetic bottleneck 0 When a population s size is greatly reduced genetic drift and inbreeding happen 0 Reduces the long term viability of a species 0 Mexico set aside habitats to relocate males and give them an opportunity to breed since only dominant males get to breed 0 50 males breeding out of 1500 seals 0 50 breeding individuals needed to keep a population going but 500 breeding is much better 0 Evolution occurs at the population level natural selection impacts individual traits Counting Sheep Video Key Points Conservation is the main value expressed during the video Factors reducing Sierra Nevada Bighorn sheep were 0 Sheep diseases Mountain lions Horn rush Human development Living in higher mountain ranges avalanches poor diet leading to no breeding or unsuccessful breeding Animal rights activists and a ban on killing mountain lions in 199039s kept the conservationalists from reducing the mountain lion population to protect the Bighorns Finally John was able to put Bighorn sheep on the endangered species list which changed the California ban on killing mountain lions Predator control is known as a form of conservation Conservationalists and animal rights activists are not the same thing one was ghting to keep mountain lion populations though they were affecting the ecosystem and the other was ghting to control the predators to save the ecosystem Bighorn Males ght to establish dominance and compete for mates and they know when the females are ready to mate by smelling their urine to see if they39re in ovulation Females ultimately get to choose their mate Sheep poop was used to nd DNA of Bighorns Radio Collars were used to track mountain lions and nd out where they were and how long they occupied an area The role of the wildlife biologist in the lm was to help track the lions and gure out which ones were causing a problem so they could eliminate them In terms of focusing on individuals or the whole during the movie the whole was focused on the success or failure of one individual did not affect the entire population Domestic sheep were a problem because they spread diseases to the Bighorns The mountain lion Foundation changed their views during the lm from wanting to protect all the mountain lions to regulating them to help keep he bighorns and save the environment The management approach for BH sheep was becoming successful but the conservationalists wanted to continue their efforts so the sheep could be advertised over a broader area 0000
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