An experiment was conducted to determine the effects of temperature on gene expression in Himalayan rabbits. After applying an ice pack to the backs of several rabbits, it was discovered that the pigmentation (color) gene in rabbit fur was active at temperatures below 25°C but inactive at temperatures above 25°C
Which of the following conclusions best supports the experiment above?
A. Genes are not affected by environmental factors.
B. Genes may be regulated by environmental factors like temperature.
C. DNA expression may be regulated by enzymes.
D. The DNA in Himalayan rabbits is similar to other types of rabbits.