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Molecular Basis of Inheritance

Multiple Choice Questions

281.

The Okazaki fragments in DNA chain growth

Results in transcription
Polymerise in the 3' to 5' direction and forms replication fork
Prove semi-conservative nature of DNA replication
Polymerise in the 5' to 3' direction and explain 3' to 5 DNA replication

282.

One gene-one enzyme relationship was established for the first time in

Neurospora crassa
Salmonella typhimurium
Escherichia coli
Diplococcus pneumoniae

283.

Balbiani rings are the structural features of

allosomes
polytene chromosomes
autosomes
lampbrush chromosomes

284.
Jumping genes in maize were discovered by

Hugo de Vries

Barbara McClintock

T H Morgan

Mendel

Barbara McClintock

Barbara McClintock discovered 'Jumping genes' or 'movable genetic elements' in maize. These can move from one location to another on the chromosome.

R W Hedges and A E Jacob (1974) introduced the term 'transposon' to jumping genes.

Hugo de Vries introduced the term 'mutation'.

T H Morgan proposed the 'gene theory' and crossing over.

Gregor Johann Mendel (1822- 1884) is known as the 'Father of Genetics'. It leads to the formulation of laws of inheritance which was carried out by Mendel.