Some individuals are unable to eat or or drink dairy products containing lactose. what causes them to be unable to tolerate lactose in their diet?

What is the sequence of amino acids corresponds with the rna strand ucg ggg cac

What are the characteristics of living things

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.