If parents wanted to learn more about their genetic history and the possibility of passing a genetic disease on to a child, they should make an appointment to

answer; polycythemia is the correct answer;

ans.

gregor john mendel is known for study of inheritance in pea plants. he used garden pea plant for his study, having alternative traits for various characters. he performed cross-breeding in pea plants to check how characters are transmitted between parents to offspring, such as cross between pure tall and pure dwarf plant. mendel studied the inheritance patterns in pea plants for various generations.

thus, the correct answer includes options and f).