TLS Online TPP Program

#Question id: 3681


 A mutated E. coli cell carries out and completes DNA replication, but the lagging strands are found to contain more errors than normal. These errors are not found evenly distributed throughout the lagging strands, but are found in clusters. Which enzymatic activity is missing from this cell?

#Section 3: Genetics, Cellular and Molecular Biology
  1. the 3’→ 5’ exonuclease activity of pol III

  2. the 5’→ 3’ exonuclease activity of pol III

  3. the 3’→ 5’ exonuclease activity of pol I

  4. the 5’→ 3’ exonuclease activity of pol I

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TLS Online TPP Program

#Question id: 4737

#Section 3: Genetics, Cellular and Molecular Biology

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?

TLS Online TPP Program

#Question id: 4738

#Section 3: Genetics, Cellular and Molecular Biology

Red kernel color in wheat results from the presence of at least one dominant allele of each of two independently segregating genes . Kernels on rr bb plants are white, and the genotypes R— bb and rr B— result in brown kernel color. Suppose that plants of a variety that is true breeding for red kernels are crossed with plants true breeding for white kernels produced F1 were allowed to selfing .what are F2 phenotype ratio ?

TLS Online TPP Program

#Question id: 4740

#Section 3: Genetics, Cellular and Molecular Biology

Following metabolic pathway for synthesis of anthocyanin product ? Which of the following cross produced all purple phenotype in their progeny ?

TLS Online TPP Program

#Question id: 4741

#Section 3: Genetics, Cellular and Molecular Biology

The F2 progeny from a particular cross exhibit a modified dihybrid ratio of 9 : 7 (instead of 9 : 3 : 3 : 1). What phenotypic ratio would be expected from a testcross of the F1?

TLS Online TPP Program

#Question id: 4745

#Section 3: Genetics, Cellular and Molecular Biology

In some goats, the presence of horns is produced by an autosomal gene that is dominant in males and recessive in females. A horned female is crossed with a hornless male. The F1 offspring are intercrossed to produce the F2. What proportion of the F2 offspring will have horns?

TLS Online TPP Program

#Question id: 4746

#Section 3: Genetics, Cellular and Molecular Biology

Two independent pure line varieties having deep red and brown phenotype in their seed coat were cross, the all f1 progeny is deep red. The F2 progeny obtain from selfing show deep red and brown in ratio of 15:1. Which of the following observation is correct?