Q20 - Genome Size and Base Composition in Horse-Family Hybrids
The adenine (A) content in DNA extracted from tissues of horse, donkey, mule and zebra has been determined. A mule is a horse x donkey hybrid. A zonkey is a zebra x donkey hybrid.
Using the information and data, determine which of the statements are true or which are false.
A. In the samples DK and ZK, the A content is likely to be identical
B. The A content of MM is likely to be approximately the weighted average of HM and DK, i.e. 23%
C. If the A content is 20%, then the G (guanine) content must also be 20%
D. The relative genome size of a zonkey is likely to be 4.1
Question reproduced from IBO 2015, Theoretical Exam B, licensed under CC BY-NC-SA 4.0 - attributed to the International Biology Olympiad. Open the full exam PDF · Community solutions (unofficial)