AP BIO_Unit 7

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Across
  1. 4. inviability, sterility
  2. 6. allele migration between populations. REduces divergence, introduces new alleles.
  3. 7. ______ selection: one extreme
  4. 11. formation of new species due to geographic isolation, geographic barrier
  5. 12. _____ selection: mate choice + competition
  6. 13. Genetic ______: random fluctuation of allele frequencies due to chance, playing a larger role in small populations and often reducing genetic variation
  7. 14. _____________ selection: humans select traits (dogs, crops)
  8. 15. Five _________ for Hardy-Weiberg Equilibrium: no mutation, random mating, no selection, large population, no gene flow.
  9. 16. ______ selection: heritable variation + differential reproduction → adaptation.
  10. 17. single ancestral species branches into two or more distinct species, accumulating differences due to different environmental pressures, leading to speciation
  11. 19. distantly related organisms independently evolve similar traits (analogous structures) as they adapt to similar environments
Down
  1. 1. ______ selection: both extremes
  2. 2. Genetic _______: population crash → lost allele. Sharp reduction in population size due to environmental events (disasters, disease) or human activities, causing a drastic loss of genetic diversity
  3. 3. _______effect: loss of genetic variation that occurs when a new population is established by a very small number of individuals
  4. 5. two species evolve together (predator-pray, pollinator, flower)
  5. 8. polyploidy, formation of new species from a single ancestral population while inhabiting the same geographic location
  6. 9. ______ selection: middle
  7. 10. temporal, behavioral, mechanical, gametic.
  8. 18. change in allele frequency in populations, not individuals