Principle Of Inheritance And Variation Question 299
Question: Assertion : In birds, the chromosome composition of the egg determines the sex. Reason : Female birds are heterogametic.
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: A
Solution:
In most birds, the females are heterogametic (designated as Z W) and males are homogametic (designated as Z Z).
The females produce two types of eggs (A + Z) and (A + W).
The male gametes or sperms are of one type (A + Z), 1 : 1 sex ratio is produced in the offspring.
BETA
