What is another term for Y-linked genes?

• A. Autosomal genes
• B. X-linked genes
• C. Holandric genes
• D. Dominant genes

Answer: (C)

Y-linked genes, commonly referred to as holandric genes, are those that are located on the Y chromosome. Since males typically have one X and one Y chromosome, any genes that reside on the Y chromosome will be inherited exclusively through male lineage. This term highlights the unique inheritance pattern of these genes, which are passed from father to son, making them distinct from those located on other chromosomes.

In contrast, autosomal genes are located on any of the non-sex chromosomes and are inherited independently of the sex chromosomes. X-linked genes are found on the X chromosome and exhibit different inheritance patterns, especially affecting males and females differently due to the presence of two X chromosomes in females and one in males. Dominant genes refer to the expression of traits in a heterozygous condition and are not specific to any particular chromosome type. Therefore, the term holandric is particularly relevant for Y-linked genes, accurately describing their inheritance and location.