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#Question id: 5703

Robertsonian translocation is reciprocal exchange of genetic segment between two acrocentric chromosomes. Which of the following is incorrect statement?

#Part-B Specialized Branches in Biotechnology

  1. Translocation resulting karyotype in humans leaves only 45 chromosomes

  2. Robertsonian translocations carrier individuals are not associated with any phenotypic abnormalities

  3. All gamete of Robertsonian translocations carrier are unbalanced gametes that lead to miscarriages or abnormal offspring

  4. Carriers of Robertsonian translocations involving chromosome 21 have a higher risk of having a child with Down syndrome

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TLS Online TPP Program

#Question id: 12956

#Part-B Specialized Branches in Biotechnology

For  nearly 200  years, biogeographers have  noted that  the  tropics  have  more terrestrial species than  temperate regions. Which of the following is NOT a plausible explanation for this pattern?
TLS Online TPP Program

#Question id: 12957

#Part-B Specialized Branches in Biotechnology

Dichlorodiphenyltrichloroethane is related to the phenomenon of:
TLS Online TPP Program

#Question id: 12957

#Part-A Aptitude & General Biotechnology

Dichlorodiphenyltrichloroethane is related to the phenomenon of:
TLS Online TPP Program

#Question id: 12957

#Part-A Aptitude & General Biotechnology

Dichlorodiphenyltrichloroethane is related to the phenomenon of:
TLS Online TPP Program

#Question id: 12958

#Part-B Specialized Branches in Biotechnology

The Norway rat (Rattus Norvegicus), a widespread pest, was controlled for about a decade by the anticoagulant warfarin. This chemical substance, placed in food pellets, is absorbed by the intestinal tract and inhibits the clotting of blood. After a population decline for about 10 years, rat populations increased and stabilized. In one European population, as illustrated in the graph below, the percentage of rats resistant to warfarin has remained fairly stable over a number of years

Resistance to warfarin is governed by a dominant autosomal gene, R. More than 15 percent of the resistant animals are heterozygous at this locus (Rr). The table below indicates the response to warfarin and relative reproductive fitness of individuals that are homozygous or heterozygous for the dominant gene (R). The RR individuals have a 20-fold increase in vitamin K requirement over individuals.


Fitness is a measure of the reproductive success of a particular genotype. The highest fitness is 1.00.

The strong dependence of RR individuals on large quantities of vitamin K probably is responsible for
TLS Online TPP Program

#Question id: 12959

#Part-B Specialized Branches in Biotechnology

Ozone layer depletion, since the 1970s, is primarily