Choose the correct sequence starting with the smallest unit: ?
a. nucleotide, allele, gene, dna, chromosome
b. gene, nucleotide, allele, dna, chromosome
c. nucleotide, dna, allele, gene, chromosome
d. dna, gene, allele, chromosome, nucleotide any idea?

The right option is c. Nucleotide, DNA, allele, gene, chromosome

Nucleotide is the basic structural unit (monomer) of a nucleic acid such as DNA.

DNA is a polymer of nucleotides that contains genetic information of a cell. A DNA nucleotide is made up of three parts which are; a nitrogen base, a five-carbon sugar, and a phosphate group.

An allele is a possible form of a gene. Genes usually have two alleles; a recessive allele and a dominant allele.

A gene is a small part of DNA that stores information.

Chromosomes are thread-like structures, composed of protein and one molecule of DNA that carry genetic information in the form of genes.