Question

If night blindness is a recessive trait, what should the phenotype of the couple's fourth child be?
a. The child could be night blind or have normal vision.
b. The child will develop night blindness later in life.
c. The child will be night blind.
d. The child will have normal vision.

Answer 1

a. The child could be night blind or have normal vision. 

Answer 2

The child could be night blind or have normal vision, (A). Is the correct answer.