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Principles of Inheritance and Variation

Short Answer Type

21. How will you find out whether a given plant is homozygous dominant or heterozygous dominant ? Explain

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One Word Answers

22. A diploid organism is heterozygous for 4 loci, how many types of gametes can be produced ?

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23. Who proposed the chromosomal theory of inheritance ?

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Short Answer Type

24. What are the two causes of variations in DNA?

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25. What is the importance of variations ?

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26. How did Mendel make sure that the plants were true breeding ?

Mendel confirmed that the plants were true breeding when the plants showed stable inheritance pattern and expression that is the seeds of white flowered plants produced only white flowered plants when cross for generations and generations.

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27. Make a table showing characters of pea selected by Mendel.

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Long Answer Type

28. Mention the advantages of selecting pea plant for experiment by Mendel.

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Short Answer Type

29. Differentiate between the following :

(a) Dominance and Recessive

(b) Homozygous and heterozygous

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Long Answer Type

30.

Explain the law of dominance using a monohybrid cross.

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