Agriculture MCQs

Page No. 107

Among the following the test cross is_________________?


aTTxTT


bTTxtt


cTtxTt


dTtxtt


View Answer Ttxtt

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


aAre useful in studies on meiosis


bGive homozygous lines following diplodization


cGrow better under adverse conditions


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



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


a2 tall: 2 dwarf


bAll the homozygous dwarf


cAll the heterozygous tall


dOne homozygous tall, one homozygous dwarf, two heterozygous tall



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


aWheat & rice


bRye & Wheat


cWheat & anglos


dRice & maize


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


bPod shape


cPlant height


dLeaf shape


View Answer Leaf shape

The chromosome number of human race is__________________?


a48


b41


c44


d46


View Answer 46

A dihybrid ratio is____________________?


a9:3:3:1


b1:1:1:1


c3:1


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


View Answer 9:3:3:1

As a result of linkage and crossingover _____________________?


aChromatids become chromosomes


bNuclear division come to close


cChromosomes become half in number


dExchange of chromosomal material



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


aMendelian monohybrids


bMendelian dihybrids


cIncomplete dominance


dNone of the above


View Answer None of the above

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


aChimera


bCelistoga


cClone


dInbreeding


View Answer Clone

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