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What are `F_1 and F_2` generations? Why are genotypic and phenotypic ratios different in these generations?

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NAVNEET PUBLICATION-HEREDITY AND VARIATION-EXERCISE
  1. Answer the following questions: What is DNA fingerprinting? Explain i...

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  2. Enlist seven traits of pea plant selected/studied by Mendel.

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  3. Answer the following question What are F1 and F2 generations? Why are...

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  4. Answer the following question What are the reasons for hereditary dis...

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  5. What are the main objectives of National Health Mission?

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  6. Answer the following question What harm is caused to body by tabacco ...

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  7. Answer the following question Why is it necessary for people to have ...

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  8. Answer the following question Is it right to avoid living with a per...

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  9. With neat and well labelled diagrams, answer the following question: ...

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  10. Enlist the functions of DNA.

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  11. With neat and well labelled diagrams, answer the following question: ...

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  12. Explain the structure, function and types of RNA.

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  13. Give the scientific reason: The albino person has pale skin and white...

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  14. Give the scientific reason: The person suffering from sickle-cell ana...

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  15. Give the scientific reason: Mitochondrial disorders are transmitted o...

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  16. Give the scientific reason: Polygenic disorders do not strickly follo...

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  17. Give the scientific reason: There is hypertension due to smoking.

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  18. Explain Mendel's monohybrid progeny with the help of any one cross.

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  19. Explain Mendel's dihybrid ratio with the help of any one cross.

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  20. What is a dihybrid cross? Explain with the help of a suitable example ...

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