the high prolifacy of the booroola merino is due to the action of a single gene. booroola actually refers to a gene called the b gene (also called f for fecundity).

This is all lower case. Can you fix that?
The high prolifacy of the Booroola Merino is due to the action of a single gene. Booroola actually refers to a gene called the B gene (also called F for fecundity).