Agriculture MCQs

Page No. 107

Among the following the test cross is_________________?


aTTxTT

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bTTxtt

✖


cTtxTt

✖


dTtxtt

✓


View Answer Ttxtt

In crop improvement programmed haploids are of great importance because they__________________?


aAre useful in studies on meiosis

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bGive homozygous lines following diplodization

✓


cGrow better under adverse conditions

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dRequire only about half the amount of chemical fertilizers compared to diploids

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The crossing of a yomozygous tall plant and a homozygous dwarf plant would yield plants in the ratio of_________________?


a2 tall: 2 dwarf

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bAll the homozygous dwarf

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cAll the heterozygous tall

✓


dOne homozygous tall, one homozygous dwarf, two heterozygous tall

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The new crop critical has been evolved by intervener hybridization between________________________?


aWheat & rice

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bRye & Wheat

✓


cWheat & anglos

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dRice & maize

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View Answer Rye & Wheat

Mendel studied contrasting characters for his breeding cxperiments with peas which of the following character he did not study_______________?


aPod color

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bPod shape

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cPlant height

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dLeaf shape

✓


View Answer Leaf shape

The chromosome number of human race is__________________?


a48

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b41

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c44

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d46

✓


View Answer 46

A dihybrid ratio is____________________?


a9:3:3:1

✓


b1:1:1:1

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c3:1

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d27:9:9:3:3:3:1

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View Answer 9:3:3:1

As a result of linkage and crossingover _____________________?


aChromatids become chromosomes

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bNuclear division come to close

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cChromosomes become half in number

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dExchange of chromosomal material

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In the F2 generation, genotypic and phenotypic ratios are identical in cases of___________________?


aMendelian monohybrids

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bMendelian dihybrids

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cIncomplete dominance

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dNone of the above

✓


View Answer None of the above

Reproduction from an unfertilized egg or reproduction without fertilization may be defined as___________________?


aChimera

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bCelistoga

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cClone

✓


dInbreeding

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View Answer Clone

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