Albinism is not caused by a change in the structure of a chromosome. It is caused by mutations in specific genes that are responsible for producing melanin, the pigment that gives color to skin, hair, and eyes.

Here's how it works:

* Genes and Chromosomes: Genes are segments of DNA that contain instructions for building proteins. Chromosomes are long strands of DNA that contain many genes.

* Albinism Genes: There are several genes involved in melanin production. Mutations in these genes can disrupt the process of making melanin, leading to albinism.

* Different Types of Albinism: There are various types of albinism, each caused by mutations in different genes.

So, while albinism is caused by changes in genes, it doesn't directly affect the structure of a chromosome. The mutations occur within the sequence of DNA that makes up the gene, rather than affecting the chromosome itself.