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36. Somatic recombination was caused by mild exposure to radiation on flies heterozygous for a given allele during specific stages of development and the individuals were allowed to develop. Such […]

Two auxotrophic strains of E. coli: A (met– bio– thr+ leu+ thi+) and B (met+ bio+ thr– leu– thi–) were incubated together for 18 hours in liquid medium and then […]

Several mutants (1-4) are isolated, all of which require compound E for growth. The compounds A to D in the biosynthetic pathway to E are known; but their order in […]

33. Three E. coli mutants were isolated which require compound ‘A’ for their growth. The compounds B, C and D are known to be involved in biosynthetic pathway to A. […]

Two new chemical compounds X and Y are synthesized in a laboratory and tested for their potency as a mutagen, The nature of the mutation produced by these compounds is […]

31. A scientist synthesized four new chemicals which had mutagenic potential and named then as Cl, C2, C3 and C4. He tried to analyse the nature of mutations caused by […]

30, A chemist synthesizes three new chemical compounds in the laboratory and names them as X, Y and Z. After analyzing mutagenic potential of all these compounds, the geneticist observed […]

A chemist synthesized three new chemical compounds, MI, M2 and M3. The compounds were tested for their mutagenic potential and were found to be highly mutagenic. Tests were made to […]

Three met E. coli mutant strains were isolated. To study the nature of mutation these mutant strains were treated with mutagens EMS or proflavins and scored for revertants. The results […]