Why Has Progress Studying the Genetic Traits of Human Beings

Question

Why has progress studying the genetic traits of human beings been slow?
A) It is impossible to make controlled crosses with human beings
B) Valid family records are difficult to obtain, and would be essential for study validity.
C) Human beings do not typically produce large numbers of progeny
D) All of these
E) None of these

Accepted Answer

All of these options contribute to the slow progress studying the genetic traits of human beings. It is difficult to make controlled crosses with human beings, valid family records are hard to obtain, and humans do not typically produce large numbers of progeny. As a result, human genetic studies are frequently based on limited samples and cannot be as easily replicated or compared to other studies.