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Botany MCQs for NEET — Practice Questions with Answers

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Genotypic and phenotypic ratios of monohybrid cross are

3:1 and 1:2:1

1:2:1 and 3:1

1:2:1 and 1:2:1

3:1 and 3:1

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Explanation

NCERT Page No. 74

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Incomplete dominance is present in

Snapdragon flower

Dog flower

Antirrhinum flower

All of the above

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Explanation

NCERT Page No. 76

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ABO blood grouping provides an example of

(i) co-dominance

(ii) Multiple allelism

(iii) Incomplete dominance

i and iii

i and ii

ii and iii

i, ii and iii

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Explanation

NCERT Page No. 77

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Recessive allele of an enzyme coding gene may be responsible for the production of

The normal/less efficient enzyme

A non-functional enzyme

No enzyme at all

Any of the above.

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Explanation

NCERT Page No. 76

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Genes which code for a pair of contrasting traits are known as

Factors

Alleles

Linked genes

Lethal genes

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Explanation

NCERT Page No. 72

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ABO blood groups are controlled by which gene

All of the above

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Explanation

NCERT Page No. 77

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Co-dominance refers to the condition where F1

resembles the dominant parent

is in-between the parents

resembled the recessive parents

resembles both the parents

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Explanation

NCERT Page No. 77

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Recessive character is expressed in

Never expressed.

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Explanation

NCERT Page No. 71

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Our ancestors knew about the inheritance of characters and variations because-

They selectively breed plants and animals and selected for organisms that possessed desirable characters.

They introduced mutations

They performed natural hybridisation

All of the above

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Explanation

NCERT Page No. 69

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Monohybrid cross can be defined as

Cross between plants differing in one chromosome

Cross between plants differing in one character only

Cross between plants differing in two traits

All of the above

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Explanation

NCERT Page No. 73

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