Multiple Choice QuestionsOne of the breeding techniques useful to eliminate harmful recessive genes by selection is
Artificial insemination
Outbreeding
Inbreeding
MOET
Minisatellites or VNTR's are used in
DNA fingerprinting
Polymerase chain reaction, (PCR)
gene therapy
Gene mapping
In the lac operon model, lactose molecules function is
inducers,which bind with the operator gene
Repressors, which bind the the operator gene
inducers, which bind the repressor protein
corepressore, which bind with the repressor protein
The thermostable enzymes, Taq and Pfu, isolated from thermophilic bacteria are
RNA polymerases
DNA ligases
DNA polymerases
Restriction endonucleases
The largest gene in man is
Insulin gene
Tumour suppressor gene
Beta globin gene of haemoglobin
Dystrophin
Which has an additional X-chromosome?
Turner’s syndrome
Klinefelter’s syndrome
Super female
Down’s syndrome
Polyploidy can be induced by the application of
Auxin
Kinetin
Colchicine
Ethylene
C.
Colchicine
Colchicine is a poisonous chemical, isolated from seeds and bulbs of autumn crocus (Colchicum autumnale). It blocks spindle formation and thus, inhibits the movement of sister chromatids to the opposite poles. The resulting restitution nucleus includes all the chromatids. As a result, the chromosome number of the cell is doubled, which leads to polyploidy.
A fern differs from a moss in having
Swimming archegonia
Swimming antherozoids
Independent gametophytes
Independent sporophytes
Development of an embryo without fertilization is called as
Apomixis
Polyembryony
Parthenocarpy
Parthenogenesis
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