Question

Assertion: Holandric genes are found on Y chromosomes.
Reason: Inheritance of holandric genes is always from father to son.
A. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
B. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
C. Assertion is correct but Reason is incorrect
D. Both Assertion and Reason are incorrect

Answer 1

Hint: The genes found on the Y chromosomes are linked to male character expression. Webbed feet and hairy ears in males are the most common examples of diseases resulting from Y-linked gene inheritance, which is also known as holandric inheritance.

Complete answer:
Holandric genes are those that are found on the Y chromosome. Only males may carry their holandric genes along to their kids; they code for maleness', but can also induce unusual diseases such as hypertrichosis pinnae and colour blindness. Only Y-linked or holandric genes, including testis determining factor, are found in the differential region of the Y-chromosome (Testis-determining factor or TDF). It's the tiniest gene in existence. It is possibly the tiniest gene, with only 14 pairs of DNA.
Genes located on the Y chromosome are known as holandric genes. These genes are passed down exclusively from father to son. Facial hair development is an example of holandric gene activity. Colour blindness is one of the diseases caused by a holandric gene mutation.
'Both Assertion and Reason are right, and Reason is the correct justification for Assertion', says the correct response.

Hence, Option A is the correct answer.

Note:
Holandric characteristics are traits that are only passed down from father to son and are only passed down from male to male. The sex hormones X and Y are found in human males. However, both males and females share the X chromosome