TLS Online TPP Program

#Question id: 4345


For a repressible operon to be transcribed, which of the following conditions must occur?

#Unit 3. Fundamental Processes
  1. A corepressor must be present.

  2. RNA polymerase and the active repressor must be present.

  3. RNA polymerase must bind to the promoter, and the repressor must be inactive.

  4. RNA polymerase must not occupy the promoter, and the repressor must be inactive.

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TLS Online TPP Program

#Question id: 4726

#Unit 8. Inheritance Biology

Which of the following is incorrect regards genomic imprinting?

TLS Online TPP Program

#Question id: 4727

#Unit 8. Inheritance Biology

if mendal had studied the seven trait using a plant with 12 chromosome instead of 14, in what manner would his interpretation have been different ?

TLS Online TPP Program

#Question id: 4728

#Unit 8. Inheritance Biology

The genotype r/r ; p/p gives fowl a single comb, R/– ; P/– gives a walnut comb, r/r ; P/– gives a pea comb, and R/– ; p/p gives a rose comb. Which of the following parental genotype would produce 3/8 Walnut comb, 1/8 pea comb, 3/8 rose comb and, 1/8 single comb?

TLS Online TPP Program

#Question id: 4729

#Unit 8. Inheritance Biology

In the following example, 3 independently assorting genes A, B and C are known to govern coat color in mice. Homozygous recessive cc (albino phenotype) is epistatic over both gene A and B, What will be the expected frequency of non albino, in the progeny from cross of AaBbCc with genotype of AABbCc?

TLS Online TPP Program

#Question id: 4730

#Unit 8. Inheritance Biology

Cross is made between a pure breeding plant having red coloured male flowers with a pure breeding plant having white colored female flowers. All of these offspring are white colored flower. Upon selfing of these F1 red flower plant produced both red and white flower. Which of the following is conclusion of these cross?

TLS Online TPP Program

#Question id: 4731

#Unit 8. Inheritance Biology

A pure-breeding strain of squash that produced disk-shaped fruits was crossed with a pure breeding strain having long fruits. The F1 had disk fruits, but the F2 showed a new phenotype, sphere, and was composed of the following proportions

Disk  384            

Sphere 96

 Long  32

What is reason for F2 phenotype?