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4.Principles of Inheritance and Variation
medium
$A$ : $XO$ type sex determination is found in large number of insects.
$R$ : Some of the sperms bear the $X-$chromosome whereas some do not
A
Assertion and Reason both are correct and also correct explanation.
B
Assertion and Reason both are correct but not explanation of assertion.
C
Assertion is correct, but Reason is incorrect.
D
Both Assertion and Reason are incorrect.
Solution
$XX -XO -$Type is found in some insects
Standard 12
Biology
