点てん突とつ然ぜん変へん異い

Meanings

1

point mutation

Technical term in genetics for a mutation affecting a single nucleotide base.

点てん突とつ然ぜん変へん異いは、DNAの一いち塩えん基きが置おき換かわることで起おこる。
A point mutation occurs when a single nucleotide base in DNA is replaced.