Answer:
the answer is simple ,is B ,Like negative
Nucleotide substitutions in a gene occur at a relatively constant rate.
A nonsynonymous substitution is a nucleotide mutation that alters the amino acid sequence of a protein. Nonsynonymous substitutions differ from synonymous substitutions, which do not alter amino acid sequences and are (sometimes) silent mutations.
<span>C) sex cells with half the original chromosome number.
Hope this helps!
</span>
