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- What is gene flow defined as? Group of answer choices A-production of new alleles B-chance loss of alleles in a population C-exchange of genes between populations D-production of new genetic material E-differential reproductive success of individualsWhat are the Effects of the recent human population explosion?Using the above graph, what is the approximate percent of the population in the US and Kenya that is under the age of 15? (number order represents US, Kenya) A24,26 B12,28 C32,62 D16,36