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.
Which has an additional X-chromosome?
Turner’s syndrome
Klinefelter’s syndrome
Super female
Down’s syndrome
The thermostable enzymes, Taq and Pfu, isolated from thermophilic bacteria are
RNA polymerases
DNA ligases
DNA polymerases
Restriction endonucleases
Minisatellites or VNTR's are used in
DNA fingerprinting
Polymerase chain reaction, (PCR)
gene therapy
Gene mapping
The largest gene in man is
Insulin gene
Tumour suppressor gene
Beta globin gene of haemoglobin
Dystrophin
Select the correct match
Alec Jeffreys - Streptococcus pneumoniae
Alfred Hershey and Martha Chase - TMV
Francois Jacob and Jacques Monod - Lac operon
Matthew Meselson and F. Stah - Pisum sativum
Select the correct statement
Franklin Stahl coined the term ‘‘linkage’’
Punnett square was developed by a British scientist
Transduction was discovered by S. Altman
Spliceosomes take part in translation
One of the breeding techniques useful to eliminate harmful recessive genes by selection is
Artificial insemination
Outbreeding
Inbreeding
MOET
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
