Two independent pure line varieties having white and green phenotype in their fruit were cross, the all f1 progeny is white fruit. The F2 progeny obtain from selfing show white, yellow and green in ratio of 12:3:1. Which of the following is correct?

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#Question id: 14680

#SCPH05 I Biotechnology

What is -40°F in degrees centigrade? degrees Rankine? kelvin?

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#Question id: 4171

#SCPH06 I Botany

Use the table below to determine which template strand DNA sequence (written in the 5ʹ → 3ʹm direction) specifies the tripeptide with the sequence gly-ala-leu.

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#Question id: 1571

#I Life Science/ Life Sciences Group – I-V

Double-stranded RNA (dsRNA) recognize by

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#Question id: 678

#SCPH28 | Zoology

Which is not true about β-sheets?

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#Question id: 15655

#SCPH01 Biochemistry

You are studying a new strain of E. coli that can utilize the disaccharide melibiose very efficiently. You find that utilization depends on the enzyme melibiase, which is encoded by the gene Mel1. Mel1 is not expressed unless melibiose is present in the growth medium. Next you isolate a mutation, designated MelB–, which gives uninducible melibiase activity. Mapping experiments show that MelB– is linked to Mel1. Using an F' factor that carries the chromosomal region surrounding Mel1, you perform the following genetic tests:

 

Describe the proposal for the type of regulatory functions affected by the MelB– mutation.