| Exposure to ultraviolet or ionizing radiation can cause ____. |
alleles |
| The non-coding sequences of a gene or pre-mRNA are ____. |
chromosomes |
| In chromatin, DNA is spooled around proteins called ____. |
exons |
| The sequences of a gene that remain in mRNA are ____. |
genes |
| Women have two X ____, whereas men have an X and Y. |
histones |
| Different forms of the same gene are called ____. |
introns |
| Nucleic acids (DNA and RNA) are polymers of ____. |
mutations |
| The amino acid sequences of proteins are specified by ____. |
nucleotides |
