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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

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

Solution

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

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A Mendelian experiment consisted of breeding tall pea plants bearing violet flowers with short pea plants bearing white flowers. The progeny all bore violet flowers, but almost half of them were short. This suggests that the genetic make-up of the tall parent can be depicted as
(a) TTWW
(b) TTww
(c) TtWW
(d) TtWw

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How did Mendel interpret his results to show that traits may be dominant or recessive? Describe briefly.

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

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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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