Explain why we use the letters v and v to represent the alleles for height

Alleles are the alternative form of gene . When we talk about the allele we have one capital letter that is V here  and one is small letter that is v  here . V represent the dominant allele and the v represent the recessive allele. V will show the dominant phenotype in the individual and it should have one copy of the allele , and the v will show recessive phenotype in the particular individual.

explanation:

on disadvantage of hydroelectric power is the cost. another disadvantage of using hydroelectric power is finding a water source powerful enough to harvest hydroelectric power.

the three components of a nucleotide are the nitrogenous base, the phosphate group and the five-carbon sugar.