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Sex of the offspring is determined by ...

Sex of the offspring is determined by
(A) only the mother, because she has two X chromosomes
(B) only the father, because he has one X and one Y chromosome
(C) an X chromosome from the mother and either an X or Y chromosome from the father
(D) mutations

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The correct Answer is:
C
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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).

CENGAGE BIOLOGY-CHROMOSOMAL THEORY OF INHERITANCE AND GENETIC DISORDERS-MANDATORY EXERCISE
  1. Mention the salient features of chromosomal theory of inheritance.

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  2. Sex of the offspring is determined by (A) only the mother, because s...

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  3. Down's syndrome is an example of (A) incomplete dominance (B) gene...

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  4. What are the main conventional symbols and signs used in genetic famil...

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  5. The genetic disorders can be grouped under two broad categories - sex-...

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  6. The egg of an animal contains 10 chromosomes, of which one is X chromo...

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  7. How is the child affected if it has grown from the zygote formed by an...

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  8. A woman of 47 years delivered an abnormal child with flattened nasal b...

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  9. In humans the sex of the child is determined by the father and not by ...

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  10. Pattern baldness is sex-linked, but cannot be expressed normally in fe...

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  11. Action of ultraviolet rays on DNA is (A) induction of thymidine dime...

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  12. A women with normal vision, but whose father was colour blind, marries...

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  13. Haemophilia is a condition, where there is (A) no production of haem...

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  14. A woman who has haemophilia marries a normal man. How many of their ch...

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  15. Identify each of the alterations of chromosome structure.

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  16. How does sickle cell anemia affect the red blood cells?

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  17. If mother and father are both sickle cell carriers, what are the chanc...

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