Which term describes genes located on the sex chromosomes, often called linked to sex?

• A. Species
• B. Sex
• C. Autosomal chromosome
• D. Messenger RNA

Answer: (B)

Genes located on the sex chromosomes are described as sex-linked. This means their inheritance is tied to whether they’re on the chromosomes that determine biological sex (the sex chromosomes, X and Y). That’s why the term associated with these genes is related to sex. So the best choice is the one that expresses this connection to sex. Autosomal chromosomes carry genes unrelated to sex, messenger RNA is a molecule involved in carrying genetic information rather than a chromosome location, and species refers to the organism type rather than where a gene sits in the genome. Understanding sex-linked inheritance also explains why certain traits show different patterns in males and females, since males have only one X chromosome and thus express X-linked alleles more readily.