Question

Which biological scenario(s) best describes a rigid phenotype for gene expression?

I. Each person has a specific blood type.
II. Red blood cell counts differ in higher altitudes.
III. One identical twin is taller than the other.



1) I only


2) II only


3) II and III only


4) I, II, and III

Answer 1

Answer is 3 because it seems more logical

Step-by-step explanation:

seems more logical

Answer 2

1) I only

Step-by-step explanation:

A person's blood type is more specific whereas one's red blood cell count and height varies.