As organisms increase in complexity from yeasts to fruit flies to humans, the number of protein-coding genes in the genome increases _______ than the number of nucleotides, and the proportion of the genome that codes for proteins _______.
A) more; greatly increases
B) more; greatly decreases
C) less; greatly increases
D) less; roughly stays the same
E) less; greatly decreases

Question

Quizplus · Accepted Answer

As organisms become more complex, the number of protein-coding genes increases less than the number of nucleotides, and the proportion of the genome that codes for proteins greatly decreases due to the presence of more non-coding DNA.

As Organisms Increase in Complexity from Yeasts to Fruit Flies