Which example best demonstrates an organism's interaction with the environment affecting gene expression? O A. a fish entering saltier waters and producing glands to remove excess salt
OB. a person with high blood pressure maintaining normal pressure levels through diet and exercise
O C. a fox producing more offspring when prey are readily available
OD. a monkey learning to use a twig to capture termites for food

plant because they survive by water, sunlight, ex.

explanation:

the answer to the blank provided is “an autosomal gene that is required for the expression of genes on the x chromosome”.

testis-determining factor, abbreviated as td, which is more popularly known as sex-determining region y or sry protein, is a dna-binding protein or  gene-regulatory protein/transcription factor, encoded by the  sry gene. it is the gene responsible for the initiation of male gender determination in humans.