Agriculture MCQs

Page No. 95

Suppose that out of 1000 offspring’s in the generation of a dithered cross, 748 are tall and hairy, 6 are tall and smooth, 4 are short and hairy and 242 are short and smooth. what is the explanation for this kind of ratio ?


aLinkage and crossing over


bPresence of multiple alleles


cPresence of lethal genes


dSex-linkage



A species or type of a plant derived from doubling the chromosome of the F1 hybrid of two known species is known as__________________?


aAutodiploid


bAutopolyploid


cHexoploid


dAmphidiploid


View Answer Amphidiploid

One of the following is not a technique in hybridization_________________?


aInosculation


bBegging


cInter over crossing


dIntraspecific crossing


View Answer Inosculation

One of the following is not an advantage of genetic engineering___________________?


aMicrobes act as biological factories


bImprovement of crop can take place


cThe gene pool is maintained


dGenetic error can be rectified



Number of lindage groups of chromosomes____________________?


aDiploid number of chromosomes


bTetraploid number of chromosomes


cHaploid number of chromosomes


dNone of the above



When an albino plant of maize (female) is crossed with normal green plant (male) all plants in the progeny are albino because___________________?


aAlbinism is dominant over green characters


bGreen plastids of male parent become nitrated


cPlastids are inherited through maternal parents


dCrossing over results in structural changes in green plastids



One of the persons whose evolutionary ideas were close to that of Laraarcd was____________________?


aLysendo


bVavilow


cWeismann


dH be vnes


View Answer Lysendo

Organic evolution through large discontinuous variations was propound by__________________?


aMendel


bDarwin


cHuge and Vnes


dLamak


View Answer Huge and Vnes

Evolution proceed on account of____________________?


aAdaptations through genervation


bConversion pf organism to change of environment


cFossils


dStruggle for existence



The first organisms to appear on the earth were more like plants than animals because__________________?


aPlants can manufacture their own food material


bThere are more plants than animals


cPlants are similar in structure


dNone of the above



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