Are segments of DNA that code for a particular trait. A combination of DNA and proteins make up

RNA, RNA proteins B. Genes, Chromosomes C. Chromosomes, Genes

What is the most appropriate method of gaining weight (muscle mass)

Is this mrna or rna need need the answer in a hurry

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.