system
Context: A gene is a locus (or region) of DNA that encodes a functional RNA or protein product, and is the molecular unit of heredity.:Glossary The transmission of genes to an organism's offspring is the basis of the inheritance of phenotypic traits. Most biological traits are under the influence of polygenes (many different genes) as well as the gene–environment interactions. Some genetic traits are instantly visible, such as eye colour or number of limbs, and some are not, such as blood type, risk for specific diseases, or the thousands of basic biochemical processes that comprise life. 

Genes can acquire mutations in their sequence, leading to different variants, known as alleles, in the population. These alleles encode slightly different versions of a protein, which cause different phenotype traits. Colloquial usage of the term "having a gene" (e.g., "good genes," "hair colour gene") typically refers to having a different allele of the gene. Genes evolve due to natural selection or survival of the fittest of the alleles.
human
do genes evolve?
gpt
Yes
human
what are polygenes?
gpt
many different genes
human
are all genetic traits visible?
gpt
No
human
can genes mutate?
gpt
Yes
human
what are different variants of genes called?
gpt
alleles
human
how many specific genetic traits are named?
gpt
Five
human
what is a locus also called?
gpt
Region
human
is eye color visible?
gpt
Yes
human
is blood type visible?
gpt
No
human
are genes related to DNA?
gpt
Yes
human
what is a gene?
gpt
DNA that encodes a functional RNA or protein product