Which are required for natural selection to occur?
a- inheritance, isolation, adaption
b- variation, overpopulation, adaptation
c- isolation, overpopulation, speciation
d- variation, inheritance, speciation

Which of th following best describes how genes produce traits in an organism?

3. in the fruit fly, recessive mutation brown, b, causes brown color of the eye and absence of red pigment. recessive mutation p of another independent gene causes purple color of the eye and absence of brown pigment. the cross of a brown-eyed female and purple-eyed male produced wild type eyes. what will be the colors and their ratio in f2?

What nerve is affected in bell palsy