It seems you're asking about a "genetics chart," which is a broad term. There are many different types of charts used in genetics, each serving a specific purpose. To give you a more specific answer, please tell me which chart you're referring to. For example, are you thinking of:

* Pedigree Chart: This chart shows the inheritance of a trait within a family, tracing it through multiple generations.

* Punnett Square: This chart helps predict the possible genotypes and phenotypes of offspring from a cross between two parents.

* Karyotype: This chart displays the complete set of chromosomes of an individual.

* Gene Map: This chart shows the location of genes on chromosomes.

* Phylogenetic Tree: This chart illustrates the evolutionary relationships between organisms.

Once you specify the type of genetics chart you're interested in, I can provide you with a detailed explanation.