gene@@1	gene	dna	29
gene@@1	gene	chromosomal unit	14
gene@@1	gene	chromosome	13
gene@@1	gene	dna gene	12
gene@@1	gene	genetic code	11
gene@@1	gene	heredity	10
gene@@1	gene	genetic unit	6
gene@@1	gene	genetic material	5
gene@@1	gene	genetic	3
gene@@1	gene	dna unit	2
gene@@1	gene	sequence	2