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Ayushree

Asked: September 26, 2025In: Class 10 Science

Q.8. Assertion (A): The sex of a child in human beings will be determined by the type of chromosome he/she inherits from the father. Reason (R): A child who inherits ‘X’ chromosome from his father would be a girl (XX), while a child who inherits a ‘Y’ chromosome from the father would be a boy (XY).

The correct answer is [A] Both A and R are true, and R is the correct explanation of A.The father contributes either an X or Y chromosome. If the child inherits X from father, it becomes XX (girl), and ...

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Ayushree

Asked: September 26, 2025In: Class 10 Science

The incorrect statement about ozone is:

The correct answer is [C] It is used as a refrigerant and in fire extinguishers.That statement is incorrect because ozone is not used as a refrigerant or in fire extinguishers. Instead, CFCs are used as refrigerants and are harmful ...

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