Chapter 11 Biology Vocab Crossword
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
 
 
Down: 1) genetic drift that occurs after a population has been greatly reduced in size3) when closely related species evolve in different directions, and become increasingly different4) when unrelated species evolve similar characteristics5) members of different populations can no longer mate successfully 7) such as when a river or mountain divides a population into two or more groups9) selection that favors a phenotype at one end, or extreme, of a range13) the process of one species becoming two or more separate species16) the process in which two or more species evolve in response to changes in each other Across: 2) evolution splits one species into a number of different species, each adapted to a different environment6) describes this pattern; long periods of little change (equilibrium) are interrupted (punctuated) by shorter periods of intense evolutionary events such as speciation8) the frequency is highest for the middle, or mean phenotype, and lowest at the two ends, or extreme phenotypes10) changes in allele frequencies that are due to chance11) a measure of how common an allele is in a population12) when timing prevents reproduction between populations14) the movement of alleles from one population to another15) occurs when a trait increases mating success, and gets passed on to the next generation17) selection that favors both extreme phenotypes18) selection that favors the middle, or intermediate, phenotype19) made up of all of the alleles of the individuals in a population20) populations that meet the five conditions listed below are said to be in this21) the observable change in the allele frequencies of a population over time22) the permanent loss of species from Earth23) genetic drift that occurs after a small number of individuals begin to live in a new area24) isolation caused by differences in courtship and mating behaviors
 

 

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