Final answer:
Genes are hereditary units consisting of sequences of DNA that occupy specific locations on chromosomes and determine particular characteristics. They are the functional units of chromosomes and code for specific proteins, which in turn determine specific traits.
Step-by-step explanation:
Genes are hereditary units consisting of sequences of DNA that occupy specific locations on chromosomes and determine particular characteristics.
They are the functional units of chromosomes and code for specific proteins, which in turn determine specific traits. Traits are the variations of characteristics, such as hair color or shape of earlobes.