TLS Online TPP Program

#Question id: 4818


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?

#Unit 3. Fundamental Processes
  1. The single-strand binding proteins were malfunctioning during DNA replication.

  2. There were one or more base pair mismatches in the RNA primer.

  3. The proofreading mechanism of DNA polymerase was not working properly.

  4. The DNA polymerase was unable to add bases to the 3′ end of the growing nucleic acid chain.

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TLS Online TPP Program

#Question id: 11617

#Unit 8. Inheritance Biology

Individuals with a particular genotype that express the phenotype expected of that genotype, this is known as

TLS Online TPP Program

#Question id: 11618

#Unit 8. Inheritance Biology

A monohybrid cross between two heterozygous  yellow mice forms the progeny in F1 generation  is  yellow and  non-yellow with the genotype YY(Lethal) and yy , so what will be the ratio of this cross?

TLS Online TPP Program

#Question id: 11619

#Unit 8. Inheritance Biology

If a cross between restricted and dusky  ducks  the only progeny will be form from this cross is restricted and mallard, so what will be the genotype of parents?

TLS Online TPP Program

#Question id: 11620

#Unit 8. Inheritance Biology

The expression of some genes is significantly affected by their parental origin, , the differential expression of genetic material depending on whether it is inherited from the male or female parent, is called

TLS Online TPP Program

#Question id: 11621

#Unit 8. Inheritance Biology

A genetic trait becomes more strongly expressed or is expressed at an earlier age as it is passed from generation to generation, this is an example of

TLS Online TPP Program

#Question id: 11622

#Unit 8. Inheritance Biology

If a cross is made between two parental homozygous allele female Red phenotype  (RR) cross with male white phenotype (rr)  resulting F1 progeny  is all red phenotype (Rr), if reciprocate this cross the resulting progeny will be change.

a) Gene expression will be the parental origin dependent

b) uniparental gene contribution and also the expression of the gene is uniparental

c) Gene expression independent over parental origin

d) Gene contribution is biparental but the expression of the gene is uniparental

This prediction concludes that,