Explanation: Black allele is dominant over brown. According to the data, there are 1660 black in a population of 2000 dogs. The Hardy-Weinberg Law states that , where:
p is the frequency of the dominant allele;
q is the frequency of the recessive allele;
So, for the dominant allele:
p² =
p = 0.911
Thus, individuals with the dominant phenotype has a frequency of p = 0.911 of happening.
The two main variables in an experiment are the independent and dependent variable. An independent variable is the variable that is changed or controlled in a scientific experiment to test the effects on the dependent variable. A dependent variable is the variable being tested and measured in a scientific experiment.