Which of the Following Is Not a Principle of Inheritance

Which of the following is not a principle of inheritance discovered by Mendel's garden pea experiments? 1.Each individual organism carries 2 copies of a gene in its normal state
2) Each individual organism randomly passes down one copy of each gene in its gametes (egg or sperm cell)
3) Each gene is inherited independently of the others and is a discrete entity

A) 1
B) 2
C) 3
D) 2 and 3 only
E) All of these