Principle Of Inheritance And Variation Question 321
Question: Assertion : Most of experiments regarding sex determination were done on Drosophila. Reason : It is a fruit fly.
Options:
A) If both the assertion and the reason are true and the reason is a correct explanation of the assertion
B) If both the assertion and reason are true but the reason is not a correct explanation of the assertion
C) If the assertion is true but the reason is false
D) If both the assertion and reason are false
Show Answer
Answer:
Correct Answer: B
Solution:
Fruit fly Drosophila is a tiny fly about 2 mm size which is often found hovering over ripe fruits like mango and banana.
Drosophila is suitable as experimental material because - (i) It is easy to grow in laboratory on a culture medium supported with yeast.
(ii) The fly has a short life span.
(iii) Numerous generations can be obtained in a year.
(iv) Females are easily distinguishable from the males.
(v) Presence of polytene chromosomes can indicate different types of chromosome aberrations.
BETA
