Topic 7 - Genetics, populations, evolution and ecosystems

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• 840fd4c9c6efb789e10e8dc195ac064fcbfd68b1 A2 BiologyTopic 7Define allele frequency The proportion of an allele within the gene pool
• e7705295a6883a8ccbe3076b26401626d44d7b6f A2 BiologyTopic 7The two Hardy-Weinberg equations p2 + 2pq + q2 = 1 / p + q = 1
• b6342cc8d6f1f8e4ccb467f766348a63650ec9b6 A2 BiologyTopic 7Define homozygous. A pair of homologous chromosomes carrying the same alleles for a single gene
• 81a269ceb906c11e259c08ea63f51b5906c65ae8 A2 BiologyTopic 7Define multiple alleles. More than two alleles for a single gene
• c547c26b207ae783a2b38dbcd4e17b4a4ec0897f A2 BiologyTopic 7Two types of speciation Allopatric or Sympatric
• 7440c6b7dbf19217438b6c935b509b98d7264378 A2 BiologyTopic 7Define genetic drift Change in the allele frequency within a population between generations
• 63e0f1efe7349c209cf2985a95253a8c64a81d54 A2 BiologyTopic 7What type of natural selection leads to speciation? Disruptive
• bbcc570b2db790dc583a04d5a50b96732d4c33b6 A2 BiologyTopic 7Define population Group of organisms of the same species living in the same habitat
• 61e8e3fdd504075918f14768fa2cf1a8d819fbd8 A2 BiologyTopic 7Define phenotype. The expression of the genes and its interactions with the environment
• 8b73a99f45fb7e77d45484c36d45d7edcfc18f66 A2 BiologyTopic 7Define interspecific competition Members of different species are in competition for the same resources that is in limited supply.
• 2ca37eecefb708b14d7d7e4e8e14c51e123291d7 A2 BiologyTopic 7Define speciation Creation of new species
• bdf4cca77fe953a4d1e690d930f36479183ce646 A2 BiologyTopic 7Define intraspecific competition Members of the same species are in competition for resources and a mate
• 2835c839d5d2b51e7a5538c3ce53a74d55b6f9e1 A2 BiologyTopic 7Define biotic factors Impact of the interactions between organisms
• 6b1e9b793c2d005721927831661e26631aa216be A2 BiologyTopic 7Define autosomal linkage. Genes that are located on the same chromosome not sex chromosomes
• fd67cb73874c7ba7695a3314c6f85384ca531827 A2 BiologyTopic 7Ensure that samples are representative by: "<li
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• >Random sampling removes bias<li
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• >Large sample<li
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• >Line transects to examine a change over a distance"
• 931e830e03b5378928dc631f1f5931c979689c53 A2 BiologyTopic 7Define community All the populations of different species in the same area at the same time
• 775c839b3a442221d689eed5008810bd35d429a6 A2 BiologyTopic 7Define sex-linkage. A gene whose locus is on the X chromosome
• b3964f4cb03f2fe19a9819169cacdcd947b0fe4e A2 BiologyTopic 7Define genotype. The genetic constitution of an organism
• 7fb76034709f3c66f1f6066e5f90088c87b648c4 A2 BiologyTopic 7Define habitat Part of an ecosystem in which particular organisms live in
• 91ee02433330e6f1931d46a1b1c12ce81b1d6ca4 A2 BiologyTopic 7Define dominant allele. An allele that will always be expressed in the phenotype
• 4370d91b03d2b0e2aa00f73005de8fe7e21862d9 A2 BiologyTopic 7Define epistasis. When one gene modifies or masks the expression of a different gene at a different locus.
• a4098f1094a30ed179cfbce8362b184289978632 A2 BiologyTopic 7Define disruptive selection When individuals which contain the alleles coding for either extreme trait are more likely to survive and pass on their alleles.
• a4593c029fac524e17b7a2c17357017c288a681c A2 BiologyTopic 7Define heterozygous. A pair of homologous chromosomes carrying two different alleles for a single gene.
• 7aad78b4f6b991b690f933d4afb9617adc4b53ef A2 BiologyTopic 7Define monohybrid Genetic inheritance cross of a characteristic determined by one gene
• c05113ead726ac9d8df1fb2e325b19a384d69bad A2 BiologyTopic 7What does substantial genetic drift lead to? Evolution
• 895a89a7807b2938daed7b83e2a5e12589be6b98 A2 BiologyTopic 7Define codominant. Both alleles are equally dominant and expressed in the phenotype.
• fed84cd683037432cd497491222cc11ebb3f70fc A2 BiologyTopic 7Predator-prey graphs "<li
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• >Size of the predator and prey population both fluctuate <li
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• >Always be more prey than predators<li
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