Hybrid tomatoes like our grandmothers grew aren’t ‘genetically modified’ in the same way as the roundup ready soy or the Bt corn. The hybrid tomatoes all had tomatoes as ancestors. And all their descendants will be tomatoes. Just maybe not the SAME tomatoes.
The ‘genetically modified’ soy, corn, canola and sugar beet crops have had genetic code from another species entirely added artificially in a lab. These resulting varieties would never have existed prior to the 1970’s and the discovery of how to diddle genomes.
Gregor Mendel would have probably thrown Holy Water on the ‘genetically modified’ stuff.
So if your kin is growing ‘genetically modified’ tomatoes then some part of that ‘tomato’ genome isn’t from a tomato. It’s from another species.
......”some part of that ‘tomato’ genome isn’t from a tomato. It’s from another species”.....
Meaning exactly what? Another plant type of something altogether different?