Simplify the following text for a Grade 13 native English-speaking person.
Original: McClintock 's research became well understood in the 1960s and 1970s , as researchers demonstrated the mechanisms of genetic change and genetic regulation that she had demonstrated in her maize research in the 1940s and 1950s .
Simplified: McClintock 's research became well understood in the 1960s and 1970s , as researchers discovered the mechanisms behind the genetic change and gene regulation that she had shown in her maize research in the 1940s and 1950s .