Answer: land area
b. In codominance and incomplete dominance, neither of the alleles are dominant.
Step-by-step explanation:
Population density is a measure of the number of people in an area relative to the land area. We should note that the formula used in its calculation is:
Population density = N/A
where,
N = total population
A = the land area
For the second part, the options include:
a. In codominance and incomplete dominance, both of the alleles are dominant.
b. In codominance and incomplete dominance, neither of the alleles are dominant.
c. In codominance, both of the alleles are dominant; in incomplete dominance, neither of the alleles is dominant.
d. In codominance, neither of the alleles is dominant; in incomplete dominance, both of the alleles are dominant.
The answer is option B.
b. In codominance and incomplete dominance, neither of the alleles are dominant.