Question

Holandric genes are located in:

• A. Somatic chromosomes
• B. X-chromosome
• C. Y-chromosome
• D. Chromosome 21

Hint:

Holandric genes are rare and can be a fascinating study in genetic inheritance patterns.

Answer 1

The Correct Option is C

Step 1: Holandric genes are genes that are located on the Y-chromosome. These genes are passed down from father to son, as males inherit the Y-chromosome from their fathers. Step 2: The Y-chromosome carries genes responsible for male sex determination and spermatogenesis. These genes are responsible for traits that are exclusively inherited from father to son, and they are not found on other chromosomes, such as somatic chromosomes, X chromosomes, or chromosome 21. Step 3: Somatic chromosomes (Option 1) are the non-sex chromosomes (autosomes) that contain most of the genes for an individual’s traits but do not carry holandric genes. Step 4: X-chromosome (Option 2) carries many genes involved in various functions and traits, but holandric genes are not located on the X-chromosome. Step 5: Chromosome 21 (Option 4) is one of the autosomal chromosomes and is not related to holandric genes. Conclusion: Holandric genes are located on the Y-chromosome, making Option (3) the correct answer.