Question

Assertion: In turtles and crocodiles, incubating temperature decides sex in the fertilised egg.
Reason: If the incubation temperature is more than critical temperature then female sex is formed.

• A. Both the assertion and reason are true and the reason is a correct explanation of the assertion
• B. Both assertion and reason are true but the reason is not a correct explanation of the assertion
• C. The assertion is true but the reason is false
• D. Both assertion and reason are false

Answer 1

The correct option is A Both the assertion and reason are true and the reason is a correct explanation of the assertion

In the non-chromosomal basis of sex determination sex is determined by the environmental variables i.e., temperature and location. The temperature-dependent sex determination is shown in crocodiles, turtles, and some lizards. The temperature of the egg during incubation is the deciding factor in sex determination, and even a small change in the incubating temperature causes changes in the sex ratio.
In turtles and crocodiles, incubating temperature above critical temperature favors femaleness and lower temperature favors maleness.