Which option best identifies the exact concept boundary for The development of understanding of genetics and evolution, The understanding of genetics (biology only): students must explain that genes were later understood to be located on chromosomes.

The correct option is Definition boundary: DNA can contain many genes; a gene has a specific coding role. This matches The understanding of genetics (biology only) because students must explain that genes were later understood to be located on chromosomes.. It is the only option that keeps DNA vs genes separate and answers the approved learning objective in The understanding of genetics (biology only).

The correct option is Definition boundary: DNA can contain many genes; a gene has a specific coding role. This matches The understanding of genetics (biology only) because students must explain that genes were later understood to be located on chromosomes.. Definition boundary: DNA can contain many genes; a gene has a specific coding role. This matches The understanding of genetics (biology only) because students must explain that genes were later understood to be located on chromosomes. is correct because DNA can contain many genes; a gene has a specific coding role. The learning objective says students must explain that genes were later understood to be located on chromosomes, so the answer must stay inside The understanding of genetics (biology only). The alternative options are wrong because they either calling a gene a whole chromosome., explaining protein coding without naming the gene as the relevant section of dna., or drift away from when asking about genes, test a section of dna, protein coding, alleles, or inherited characteristics..