The Majority of the Nonrepetitive Genes in an Organism Are

Question

The majority of the nonrepetitive genes in an organism are found in which of the following?
A) unique sequences
B) moderately repetitive sequences
C) highly repetitive sequences
D) None of these choices are correct.

Accepted Answer

Unique sequences refer to DNA sequences that occur only once within a genome. These sequences are not repeated, and therefore, the majority of the nonrepetitive genes in an organism are found in unique sequences. Moderately repetitive sequences occur a few hundred times in the genome, while highly repetitive sequences can occur thousands or millions of times, such as in tandem repeats. However, neither moderately nor highly repetitive sequences contain genes, and the question specifically asks about nonrepetitive genes.