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TLS Online TPP Program

#Question id: 7127

The immunoglobulin genes are expressed in B-cells, and the b-globin gene is expressed in red blood cells. What manipulations might be carried out to get the b-globin gene to be expressed in B-cells?

#Unit 5. Developmental Biology
  1. The coding region of an immunoglobulin gene could be combined with the cis-regulatory region of the b-globin genes, and this artificial gene would then express b-globin in B-cells.
  2. The cis-regulatory region of the b-globin gene could be inserted into B-cells, which would then express their own version of the b-globin gene.
  3. The cis-regulatory region of an immunoglobulin gene could be combined with the coding region of the b-globin genes, and this artificial gene would then express b-globin in B-cells.

  4. The transcription factors GATA-1 and GATA-2 (which activate the b-globin gene in erythrocytes) could be introduced into B-cells, which would then express their own copy of the b-globin gene.

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TLS Online TPP Program

#Question id: 4817

#Unit 8. Inheritance Biology

How many different gametes can be formed by an organism with genotype AaBbCCddEe, If a, b and c gene are completely link?
TLS Online TPP Program

#Question id: 4818

#Unit 3. Fundamental Processes

Researchers found a strain of E. coli bacteria that had mutation rates one hundred times higher than normal. Which of the following statements correctly describes the most likely cause of these results?
TLS Online TPP Program

#Question id: 4819

#Unit 8. Inheritance Biology

Plant with genotype AB/ab is test cross, two genes are linked are 10 map units apart. What proportion of progeny will have the genotype aabb?
TLS Online TPP Program

#Question id: 4820

#Unit 8. Inheritance Biology

Which of the following gametes are produced in grater proportional by an individual of genotype Ab/aB if the genes are in the same chromosome with some recombination between them?
TLS Online TPP Program

#Question id: 4821

#Unit 8. Inheritance Biology

What are frequency of recombination  if one cell carry out cross over every 50 cell undergoes meiosis ?
TLS Online TPP Program

#Question id: 4822

#Unit 8. Inheritance Biology

In a particular species of mammal black hair (B) is dominant to green hair (b) and red eyes (R) are dominant to white eyes (r). If a BbRr individual is mated with a bbrrindividual the expected phenotypic ratio of the offspring is 1 black-red : 1 black-white: 1 green-red : 1 green-white. However, when you mate these individuals you find that the phenotypic ratio of the offspring is 6 black-red :1 black-white : 1 green-red : 6 green-white. What could account for this difference?