Shown below is a pedigree of an individual X who is suffering from ocular albinism which results in permanent vision loss. Use the pedigree to answer the questions that follow:
![](https://poraxali.com/?qa=blob&qa_blobid=9827275406519077270)
(a) Complete the following statement about this disease: The trait for the disease is linked to ___________ (X-chromosome/Ychromosome/autosome) and is __________ (dominant/recessive).
(b) Give a reason to support your answer to (a).
(c) Identify the genotypes of individuals P, Q, R and S marked in the pedigree.