Genetics

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Across
  1. 1. there is one inside each nitrogen base in each gene which is inside th
  2. 5. the building block of genes
  3. 6. the nucleus is inside this
Down
  1. 1. the chromosome is inside it
  2. 2. it is technically built by nitrogen bases
  3. 3. the genes are inside of this
  4. 4. it is inside the DNA which is inside the chromosome