Gene expression depends on the interaction of maternally and paternally inherited alleles.
Genetic crosses help determine the location of genes on chromosomes 4. Locating the position of genes on chromosomes is an important step in our attempt to understand the basis of normal gene function and genetic disease. While some traits are controlled by a single gene showing simple dominance, most traits are governed by several to many genes displaying incomplete dominance. Sex-linked traits express themselves differently than traits governed by genes located on autosomes. Information to Know 1.