Certain problems with molecular clocks can be overcome by using many genes

Certain problems with molecular clocks can be

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Certain problems with molecular clocks can be overcome by using many genes rather than just a few. 14.) Three domains are used since it highlights the fact that much of the history on Earth has been about single celled organisms. Chapter 26 15.) Some important adaptations required for plants to adapt to a terrestrial environment are a root system and waxy cuticle. A change in allele frequencies among a population over generations. 16.) Sources of genetic variation include: Formation of new alleles, altering gene number or position, rapid reproduction and sexual reproduction. 17.) The Five Hardy-Weinberg Equilibrium Conditions Are: No gene flow Random mating Large population No natural selection No mutations 19.) Genetic Drift is the variation of allele frequencies between generations. Gene flow is the transfer of alleles from one population to another. 20.) Directional: Moves the population average in one direction Disruptive: Both extremes are favored Stabilizing: Removes both extremes from the population, increasing the median 21.) Sexual selection may make female species favor mating with males with colored feathers. Over time, this trait may become very common since those with it are more likely to reproduce. 22.) Having a heterozygote advantage means that heterozygotes at a specific locus have an advantage over either type of homozygote. An example could be with sickle cell, which shows
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  • Fall '17
  • Randy Smith
  • Evolution, 50%, 4.6 billion years, Sasha Preston

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