M Prep | MCAT 2015 Question of the Day - Prep, Practice Questions, and More!

Q:

How many of the following contribute to genetic variability?

1. Formation of chiasmata between homologous chromosomes
2. Co-dominance between two alleles
3. Independent assortment of chromosomes during Meiosis I
4. Backcrossing between pure dominant or pure recessive phenotypes
5. Mendel's Third Law of Segregation

A

Two

B

Three

C

All five

D

None