Which of the following is the correct explanation for linked genes?

• A. Linked genes are located on different chromosomes and assort independently during meiosis.
• B. Linked genes are genes that have identical sequences and perform the same function.
• C. Linked genes are located close together on the same chromosome and tend to be inherited together.
• D. Linked genes are alleles that are always expressed together in the phenotype.

Answer: (C)

Verified step by step guidance

1. Understand the concept of linked genes: Linked genes are genes that are located close together on the same chromosome. Because of their proximity, they tend to be inherited together during meiosis, which is the process of cell division that results in gametes.
2. Consider the process of meiosis: During meiosis, homologous chromosomes can exchange genetic material through a process called crossing over. However, genes that are close together on the same chromosome are less likely to be separated by crossing over, hence they are 'linked'.
3. Differentiate linked genes from independent assortment: Independent assortment refers to genes located on different chromosomes that segregate independently during meiosis. Linked genes do not assort independently because they are on the same chromosome.
4. Evaluate the options given: The correct explanation for linked genes is that they are located close together on the same chromosome and tend to be inherited together. This is due to their physical proximity, which reduces the likelihood of being separated during crossing over.
5. Clarify misconceptions: Linked genes are not identical sequences performing the same function, nor are they alleles always expressed together in the phenotype. They are simply genes located near each other on the same chromosome.