A reduction of the amount of product of a particular gene is observed due to a mutation. This type of a mutation is called

Deletion

When a small segment of chromosome is missing a mutation is called deletion. Since chromosome are made of DNA and DNA constitutes genes so Genes are actually present on chromosomes and when a small segment of chromosomes went missing reduced amount of genes is observed

colors do exist. the color of the sky is actually violet; humans percieve the color of the sky as blue.

answerall of the above;