The purpose of genetic modification is to benefit human kind, regardless of disadvantages or environmental effects.
Usually when you are trying to figure out different possibilities of offspring using punnet squares, 4 genotypes can be figured out. I think that it also depends on how you are finding out the different genotypes for offspring.
The choices for the above question are:
a.single gene-pair inheritance.
b.shared environmental influence.
c.gene-environment interaction.
d.polygenetic inheritance.
The concept which is defined is gene-environment interaction. The answer to your question is C. I hope this is the answer that you were looking for.
1. two points
2.respiratory and organs
3.heart and heart
4.homogenous process/system