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Solution - Rules for the Inheritance of Traits - Mendel’s Contributions

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ConceptRules for the Inheritance of Traits - Mendel’s Contributions  

Question

How do Mendel's experiment show that traits are inherited independently?

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In one of his experiments with pea plants, Mendel observed that when a pure tall pea plant is crossed with a pure dwarf pea plant in the first generation, F1, only tall plants appear.

(a) What happens to the traits of the dwarf plants in this case?

(b) When the F1-​generation plants were self-fertilised, he observed that in the plants of the second generation, F2, both tall plants and dwarf plants were present. Why it happened? Explain briefly.

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A study found that children with light-coloured eyes are likely to have parents with light-coloured eyes. On this basis, can we say anything about whether the light eye colour trait is dominant or recessive? Why or why not?

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"A trait may be inherited, but may not be expressed." Justify this statement with the help of a suitable example.

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List any two contrasting characters other than height that Mendel used in his experiments in pea plants.

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A pea plant with blue colour flower denoted by BB is cross-bred with a pea plant with white flower denoted by ww.

(a) What is the expected colour of the flowers in their F1 progeny?

(b) What will be the percentage of plants bearing white flower in F2 generation, when the flowers of F1 plants were selfed?

(c) State the expected ratio of the genotype BB and Bw in the F2 progeny.

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Solution for concept: Rules for the Inheritance of Traits - Mendel’s Contributions. For the course 8th-10th CBSE
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