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TLS Online TPP Program

#Question id: 12003

The graph below shows the growth rates of populations of bacteria that have evolved for many generations at different culture temperatures (25°C, 30°C, and 35°C). Each population grows over only a limited range of temperatures (its thermal niche), which are bounded by its critical thermal limits. Within this range, growth rate increases with temperature up to a maximal value and then declines rapidly with increasing temperature. Growth rates are known to be the major determinant of fitness for these bacteria.
If all three populations were mixed together and placed at 37°C, which of the following would be most likely to happen?

#Unit 10. Ecological Principles

Only the population evolved at 25°C would die and become extinct.
Only the population evolved at 35°C would survive and reproduce.
All the bacteria would die and the populations would become extinct.
All populations would grow, and transfer of genes would create one common population.

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TLS Online TPP Program

#Question id: 13149

#Unit 8. Inheritance Biology

A three point test cross was made between the st^+-e^+-ss^+ and st-e-ss , the genotype of the double cross over will be; st^+-e-ss^+ and st-e^+-ss. Based on this, determine the order of the genes.

TLS Online TPP Program

#Question id: 13150

#Unit 8. Inheritance Biology

A fruit fly Drosophila melanogaster showing three point test cross st+-e+-ss+ was crossed with triplet recessive mutant st-e-ss. The F1 hybrid was the backcross with the recessive mutant and the phenotype recorded as follows;

The distance in map unit (mu) between st+ to e+ and e+ to ss+ is

TLS Online TPP Program

#Question id: 13151

#Unit 8. Inheritance Biology

A series of two-point crosses were carried out among five loci (a, b, c, d and e) producing the following recombination frequencies. Using these recombination frequencies, map these five loci, showing their linkage groups, the order of the loci in each linkage group is;

What is the correct order of the loci?

TLS Online TPP Program

#Question id: 14922

#Unit 8. Inheritance Biology

Which is an example of a study that might be done by a transmission geneticist?

TLS Online TPP Program

#Question id: 14923

#Unit 8. Inheritance Biology

Which of the following were key reasons for Mendel's success in elucidating his genetic laws?

TLS Online TPP Program

#Question id: 14924

#Unit 8. Inheritance Biology

Which is NOT a characteristic that made peas useful as a model system for Mendel's studies?