Describe a hypothetical scenario of natural selection for a trait. Be sure to describe each of the following key elements: a) identify the trait (e. g. a type of disease immunity, a physical feature, etc.) b) how the trait varies in the population c) how the trait factors into resource competition and/or survival d) how the trait frequency changes over multiple generations

During crossing-over, a. genetic material is exchanged between nonsister chromatids, resulting in new combinations of alleles. b. nonsister chromatids from each homologous chromosome of a tetrad are exchanged, resulting in new combinations of alleles. c. one homologous chromosome of a tetrad is exchanged with another tetrad, resulting in new combinations of alleles. d. sister chromatids from each homologous chromosome of a tetrad are exchanged, resulting in new combinations of alleles. e. genetic material is exchanged between sister chromatids, resulting in new combinations of alleles.