Which best summarizes the role of DNA in the production of proteins? o DNA moves to the cytoplasm to build proteins.
o DNA transports amino acids to the ribosomes to make proteins.
o DNA contains the instructions used to make proteins.
o DNA breaks hydrogen bonds between amino acids.

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.