If the two double-mutant recombinants in a tetratype ascus cannot be distinguished. phenotypically from the four single-mutant parental types, progeny-tests or complementation-tests may be. required. The reverse situation may arise, where it is desired to recover a single-mutant component from a double. mutant strain.
For places named New Market, see New Market (disambiguation). Newmarket is a market town in the English county of Suffolk, approximately 65 miles (105 kilometres) north of London. It is generally considered the birthplace and global centre of thoroughbred horse racing and a potential World Heritage Site.
Newmarket, Ontario. Newmarket (2016 population 84,224) is a town and regional seat of the Regional Municipality of York in the Canadian province of Ontario. It is part of Greater Toronto in the Golden Horseshoe region of Southern Ontario. Many Newmarket residents commute to Toronto, located south of the town.