TLS Online TPP Program

#Question id: 5436


Quantitative characteristics arise from two phenomena either polygenic or environmental influence on genotype. Which of the following is not character of quantitative polygenic trait?

#Unit 8. Inheritance Biology
  1. Single genotype producing a range of phenotypes

  2. Single genotype mayproduce a single phenotype

  3. Many different genotypes may produce the same phenotype

  4. Extreme phenotype must encoded by a single genotype

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TLS Online TPP Program

#Question id: 8710

#Unit 9. Diversity of Life Forms

A phylogenetic tree constructed using sequence differences in mitochondrial DNA would be most valid for discerning the evolutionary relatedness of ________.

TLS Online TPP Program

#Question id: 8712

#Unit 9. Diversity of Life Forms

The lakes of northern Minnesota are home to many similar species of damselflies of the genus Enallagma. These species have apparently undergone speciation from ancestral stock since the last glacial retreat about 10 thousand years ago. Sequencing which of the following would probably be most useful in sorting out evolutionary relationships among these closely related species?

TLS Online TPP Program

#Question id: 8713

#Unit 9. Diversity of Life Forms

Which statement represents the best explanation for the observation that the nuclear DNA of wolves and domestic dogs has a very high degree of sequence homology? Dogs and wolves ________.

TLS Online TPP Program

#Question id: 8714

#Unit 9. Diversity of Life Forms

The reason that paralogous genes can diverge from each other within the same gene pool, whereas orthologous genes diverge only after gene pools are isolated from each other, is that ________.

TLS Online TPP Program

#Question id: 8715

#Unit 9. Diversity of Life Forms

Which of the following items is most likely to form a simple linear relationship with the number of gene-duplication events, when placed as the label on the vertical axis of the following graph?

TLS Online TPP Program

#Question id: 8716

#Unit 9. Diversity of Life Forms

The most important feature that permits a gene to act as a molecular clock is ________.