What challenges do scientists who want to study particular genes face

The challenges that scientists who want to study particular genes face are as follows:

1. There are many genes on a typical chromosome - A chromosome typically contains hundreds to thousands of genes.

2. A small fraction of each chromosome encodes genes -  Genes only make up a small percentage of the genome; the rest is composed of non-coding sequences.

3. It is difficult to distinguish between genes and non-coding genetic information - discriminating between coding and noncoding regions in a given nonannotated genomic sequence is quite difficult.