HEREDITY
Intext Questions
Page 147:
- If a trait A exists in 10% of a population of an asexually reproducing species and a trait B exists in 60% of the same population, which trait is likely to have arisen earlier?
- How does the creation of variations in a species promote survival?
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3. How do Mendel’s experiments show that traits may be dominant or recessive?
4. How do we know whether a particular trait is inherited and not the result of environmental factors?
5. Why are the traits acquired during a lifetime not inherited?
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6. Why are sex chromosomes named so?
Exercise Questions
Page 157-158:
How is the sex of the child determined in human beings?
A man with blood group A marries a woman with blood group O, and their child has blood group O. Explain how this is possible. Which trait is dominant and recessive here?
What is heredity? Why is it important in variation?
Explain the terms dominant trait and recessive trait with an example.
How do Mendel’s experiments show that traits are inherited independently?
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