Final answer:
Galton's concerns about 'differential fertility' of 'genetically-inferior' individuals align with the principles of eugenics, which are now discredited. Eugenics aimed to influence population genetics by selective breeding, raising ethical and scientific concerns.
Step-by-step explanation:
Galton's concern about 'differential fertility' among individuals he considered 'genetically-inferior' is true. Part of the pseudoscientific field of eugenics, this idea posited that human evolution could be affected by selectively breeding so-called superior traits and reducing the reproduction of those with 'inferior' genetics. The ethical implications were significant, and such notions have been largely discredited due to their moral and scientific flaws.
The study of eugenics attempted to influence the genetic makeup of populations to prevent the perceived spread of undesirable traits, raising complex discussions around modern reproductive technologies and selective breeding. These discussions touch upon concepts such as the frequency of beneficial alleles and selective breeding's potential impact on genetic changes, anthropogenesis, and harmful phenotypes due to inbreeding.