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TLS Online TPP Program

#Question id: 16968

Parallel evolution is a term that has been used to describe cases in which independent evolution of a character state is thought to have similar genetic and developmental bases, especially in closely related species. Which statements is true for

#Unit 11. Evolution and Behavior
  1. Evolutionary reversals constitute a return from a derived character
  2. Distinction between parallel evolution and convergent evolution may be very meaningful because, as we will see, the same gene often contributes to similar evolutionary changes in related organisms.
  3. Distinction between parallel evolution and convergent evolution may not be very meaningful because, as we will see, the same gene often contributes to similar evolutionary changes in distantly related organisms.
  4. Mutational change in a specific gene, Pitx1, is the basis of independent loss of the pelvic girdle and fins in many freshwater populations of a small fish, the three spined stickleback stickleback
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TLS Online TPP Program

#Question id: 18077

#Unit 7. System Physiology – Animal

During which stage of the general adaptation syndrome (GAS) does the body adjust to the new stressor?
TLS Online TPP Program

#Question id: 18078

#Unit 9. Diversity of Life Forms

Which of the following can be found in gymnosperms? 
TLS Online TPP Program

#Question id: 18079

#Unit 9. Diversity of Life Forms

Within a gymnosperm megasporangium, what is the correct sequence in which the following should appear during development, assuming that fertilization occurs? 
1. Sporophyte embryo 2. female gametophyte 
3. egg cell                 4. megaspore 
TLS Online TPP Program

#Question id: 18080

#Unit 9. Diversity of Life Forms

The following are all adaptations to life on land except
TLS Online TPP Program

#Question id: 18081

#Unit 8. Inheritance Biology

The interaction of selection and inbreeding in determining the incidence of autosomal recessive diseases. Consider a gene in which recessive mutations occur at a rate of 10-5. Assume a selective disadvantage S of 0.4 in homozygotes for the recessive allele. What is the frequency of the recessive allele (q). And calculate the incidence of the disease. Assume random mating.
TLS Online TPP Program

#Question id: 18082

#Unit 8. Inheritance Biology

The interaction of selection and inbreeding in determining the incidence of autosomal recessive diseases. Consider a gene in which recessive mutations occur at a rate of 10-5. Assume a selective disadvantage S of 0.4 in homozygotes for the recessive allele. Now assume that, for thousands of generations, 10% of all children have been products of first-cousin matings (the remaining 90% being products of random matings). Calculate the steady-state value of q. Also calculate the incidence of the disease at steady state.