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Genetic Diversity of Offspring • Genes have a better • Why do you think it would chance of survival if be advantageous to have they are rearranged genes rearrange each at each generation generation? • Only offspring that are • Are you a twin, or do you not diverse are twins know any twins? Do you – Identical twins – Fraternal twins think twins would act different if they grew up apart? Homozygous and Heterozygous • When two genes at the same locus on a pair of chromosomes are the same the individual is homozygous at that locus • When the two genes are not the same the individual is heterozygous at that locus Dominant and Recessive Genes • A dominant gene is one that will produce its observable effects in either the homozygous or heterozygous condition • A recessive gene is one that will only produce its observable effects in the homozygous condition