Dominic has been told that he is not able to reproduce, even though his parents had five children. Which explanation can account for the difference in ability to reproduce? A
Dominic may have inherited two alleles that, when combined, result in a condition that will not allow him to reproduce.
B
Dominic may have a genetic mutation.
C
The difference in reproductive ability may be due to an environmental cause.
D
Though some of the above are more likely than others, all of the above are possible explanations.