One of the persons whose evolutionary ideas were close to that of Laraarcd was____________________?
A. Lysendo B. Vavilow C. Weismann D. H be vnes
Plant Breeding and Genetics MCQs
When an albino plant of maize (female) is crossed with normal green plant (male) all plants in the progeny are albino because___________________?
A. Albinism is dominant over green characters B. Green plastids of male parent become nitrated C. Plastids are inherited through maternal parents D. Crossing over results in structural changes in green plastids
Number of lindage groups of chromosomes____________________?
A. Diploid number of chromosomes B. Tetraploid number of chromosomes C. Haploid number of chromosomes D. None of the above
One of the following is not an advantage of genetic engineering___________________?
A. Microbes act as biological factories B. Improvement of crop can take place C. The gene pool is maintained D. Genetic error can be rectified
One of the following is not a technique in hybridization_________________?
A. Bagging B. Inter over crossing C. Intraspecific crossing D. Inosculation
A species or type of a plant derived from doubling the chromosome of the F1 hybrid of two known species is known as__________________?
A. Autodiploid B. Hexaploid C. Autopolyploid D. Amphidiploid
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 ?
A. Linkage and crossing over B. Presence of multiple alleles C. Presence of lethal genes D. Sex-linkage
Many groups of insects have developed resistance to DDT and other insecticides as a result of____________________?
A. Crossing over B. Polyploidy C. Segregation D. Gene mutation
Linked gene may be separated by the process of_________________?
A. Evolution may be described as B. History of development of larger biological units C. Inheritance of acquired characters D. Discontinuous genetic variation
The offspring of a cross between twp individuals differing in at least one set of characters is called__________________?
A. Polyploidy B. Mutant C. Variant D. Hybrid