270)Contrast the positions of the nativists with that of the empiricists. Name a leading proponent of each camp. 271)What is the human genome? What is the current estimate of the number of genes in the human genome? 272)What two processes during the formation of sperm and eggs help explain genetic changes within a population? 273)What role does “crossing over” play in the changing of gene frequencies in a population from one generation to the next? 274)Distinguish between intersexual and intrasexual selection.