A thread of DNA made up of a string of genes is called a?

A thread of DNA made up of a string of genes is called a?

• A. Chromosome
• B. Genome
• C. Nucleotide
• D. Allele

Answer: (A)

A chromosome is a long DNA molecule that carries many genes arranged along its length. This description fits a thread of DNA made up of a string of genes because the genes are lined up along the same DNA molecule and form a single unit of heredity. The genome, by contrast, is the entire set of genetic material in an organism; a nucleotide is one building block of DNA; an allele is a version of a gene. So the term that best matches a single continuous thread of DNA containing multiple genes is chromosome.

A chromosome is a long DNA molecule that carries many genes arranged along its length. This description fits a thread of DNA made up of a string of genes because the genes are lined up along the same DNA molecule and form a single unit of heredity. The genome, by contrast, is the entire set of genetic material in an organism; a nucleotide is one building block of DNA; an allele is a version of a gene. So the term that best matches a single continuous thread of DNA containing multiple genes is chromosome.