The presence of freckles is due to a dominant allele. Four percent of the individuals in a particular population lack freckles. Use the Hardy-Weinberg formula to calculate the percentage of individuals in this population who are homozygous dominant for freckles.
a) 32%
b) 80%
c) 64%
d) 20%
e) 4%

Option C

Explanation:

Allele for dominant freckle trait is "F"

Allele for recessive no freckle trait is "f"

Given -

Population lacking freckles  %

As per Hardy Weinberg's equilibrium equation

p represents the frequency of dominant allele in a given population and represents the frequency of dominant individuals in a given population

Like wise

q  represents the frequency of recessive allele in a given population and represents the frequency of recessive individuals in a given population

Frequency of dominant allele

Frequency of homozygous recessive individual

Frequency of homozygous dominant individual

Option C is correct

sulfur dioxide

explanation: acid rain is caused by a chemical reaction that begins when compounds like sulfur dioxide and nitrogen oxides are released into the air. these substances can rise very high into the atmosphere, where they mix and react with water, oxygen, and other chemicals to form more acidic pollutants, known as acid rain.