The answer is B hope this helps you:) I did this test yesterday
Question was't arranged i have arranged it in ask for detail section.
Answer:
Option e. homozygous is the correct answer.
Explanation:
A gene which has two identical alleles on homologous chromosomes is called homozygous. It is denoted by XX (capital letters) for dominant character (alleles) and xx (lowercase letters) for recessive character (alleles).
The medication would be the controlled variable, the factor that remains constant.