Biology 2003 JAMB Past Questions - Question 41: An organism that has been extensively used to test the chromosome theory of heredity is

Correct Answer

A

Explanation

ADmsophilamelnnoqaster (fruit fly) is probably the most useful of all organisms ingenetic research because it has three advantages.a) Thefruitfly breeds in large numbers every ten days and this makes it easy forgeneticists to follow the transmission of traits through several generationswithin a short time.b) Itis small in size and therefore easily stored in half-pint bottles.c) ithas only four pairs of easily distinguishable chromosomes in each cell whichcarry distinct characteristics such as eye colour, length of wings and bodycolour(SAT - IIBiology).