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TLS Online TPP Program

#Question id: 23670

How might infection of a plant by E. coli transformed with a recombinant Ti plasmid be used to have a new gene (e.g. insect toxin) expressed in all cells of the plant?

#Unit 13. Methods in Biology
  1. The original plant will eventually express the new gene in all its cells even if only a few cells of the plant are initially infected by E. coli.
  2. Pollen cells must be infected and then used to produce the next generation of plants which will express the new gene in all cells.
  3. Any cell from the original plant that is infected with the E. coli is removed and treated to dedifferentiate and eventually to grow into an entire new plant in which the new gene is expressed throughout.
  4. All of the above
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TLS Online TPP Program

#Question id: 4828

#Unit 8. Inheritance Biology

Consider two pairs of alleles, G/g and H/h, that follow complete dominance inheritance. The initial cross consisted of GG hh males and gg HH females, and the F I female progeny were test crossed with gg hh males to produce 380 Gghh progeny out of 1000 total progeny. What is approximate distance between Gene G and H.
TLS Online TPP Program

#Question id: 4829

#Unit 8. Inheritance Biology

Plant with genotype AaBb is selfed . the two gene are linked and are 50 map units apart. What proportion of progeny will have the genotype aabb?
TLS Online TPP Program

#Question id: 4830

#Unit 8. Inheritance Biology

Blue flower is dominant over white flower and long pollen is dominant over short pollen. A pure line plant with Blue flower and long pollen was cross with white flower and short pollen. F1 plant was allowed to test cross to produced numerous Offspring in following number

Blue flower and long pollen            2000

Blue flower and short pollen             500

White flower and long pollen            500    

White flower and short pollen         2000

What is approximate distance between Flower color gene and pollen length gene?
TLS Online TPP Program

#Question id: 4831

#Unit 8. Inheritance Biology

There are 4 pairs of chromosomes in a Drosophila.The linkage groups present in it are
TLS Online TPP Program

#Question id: 4832

#Unit 8. Inheritance Biology

Percentage of crossing over is more when
TLS Online TPP Program

#Question id: 4833

#Unit 8. Inheritance Biology

If the percentage of chance of crossing over between two genes is10, then the distance between two genes will be