The gene map below shows some of the genes on chromosome 2 of the fruit fly Drosophila melanogaster.

b is dominant over the allele for the white fur.

the answer is z.

the human body has five levels of organization. level 1: cells. cells are the basic units of life and form the first level of organization. cells in the human body have specific functions. examples include nerve cells, blood cells, liver cells, and so on.