Result from successive mutations of the same gene.

Multiple Alleles  result from successive mutations of the same gene.

Explanation:

Multiple alleles or polyalelia is the situation where a gene (genotype) presents three or more alleles, not just two, for the same chromosomal locus (gene address), determining a characteristic (phenotype).

Multiple alleles are the result of successive mutations in the genes of a given locus. Each mutant gene that emerges establishes a condition for the appearance of yet another new phenotypic expression of that particular character in that species.

hey, i believe your answer would be d. sugar ribose and the base uracil. i believe this is the answer, because rna consists of sugar ribose, adenine, guanine, cytosine, and uracil.

your first option is incorrect, because that's dna. where it consists of sugar deoxyribose, adenine, guanine, cytosine and thymine.

your second option is also incorrect, this is because sugar deoxyribose is in dna, and uracil is in rna. these two do not make sense together.

your third option being incorrect, because sugar ribose is in rna, but not the base of thymine. rna consists of uracil, not thymine.

lastly your fourth option being correct! this answer is correct, because both sugar ribose, and the base uracil are in rna! ~

answer is d. sugar ribose and the base uracil.

the answer would be knowledge about cars!