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Domesticated Varieties

New varieties...

Question

New varieties of plants are produced by

A

Selection and hybridisation

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B

Introduction and mutation

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C

Introduction and selection

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D

Mutation and selection

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Solution

The correct option is A
Selection and hybridisation

New varieties of plants have an improvement in genetic characteristics in plant breeding. So classical plant breeding includes hybridisation of pure lines and artificial selection to produce plants with desirable characters

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Q. Match the following columns and choose the correct option.

\begin{matrix} C o l u m n I & C o l u m n I I (a) Mutation breeding & 1. Laborious and expensive process to obtain gene variation (b) Selection & 2. Hybrid vigour can be maintained for several generations (c) Hybridisation & 3. Planting a plant in a new locality from its native place (d) Introduction & 4. Oldest breeding method 5. Quick method to obtain gene variation \end{matrix}

Q.
Mutation, selection and genetic drift are three important forces which are responsible for evolutionary changes

Q. Why are haploids selected for inducing mutation in plant breeding?

Q. Mendel selected how many characters and varieties respectively of pea plant for hybridisation experiments?

Q. In the absence of mutation, migration and selection, if gene frequencies are changed in a population, the change is due to

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