Question

________ determines the sex of fertilised eggs in a few reptiles?

• A. Moisture
• B. Autosome
• C. Temperature
• D. Allosome

Answer 1

Answer:

C. Temperature

• Temperature determines the sex of fertilised eggs in some reptiles.One of the best-studied reptiles is the European pond turtle, Emys obicularis.

• In laboratory studies, incubating Emys eggs at temperatures above 30°C produces all females, while temperatures below 25°C produce all-male broods.

• The threshold temperature (at which the sex ratio is even) is 28.5°C