Molecular Evolution MBG4072 Introduction Quiz
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Questions and Answers

What term describes a gene/protein related to a second gene/protein by descent from a common ancestral gene by speciation?

  • Paralog
  • Convergent evolution
  • Ortholog
  • Homolog (correct)

Which mechanism involves the evolution of similar features or properties in genes/proteins of different genetic lineages?

  • Ortholog
  • Mutation
  • Paralog
  • Convergent evolution (correct)

What is the term that describes genes/proteins in different species that evolved from a common ancestral gene by speciation and retain the same function?

  • Ortholog (correct)
  • Convergent evolution
  • Paralog
  • Mutation

What type of evolution involves genes/proteins related by duplication of a common ancestral gene that evolves new functions even if related to that of the ancestor?

<p>Paralog (A)</p> Signup and view all the answers

What type of evolution involves the evolution of a new gene/protein that is genetically independent of the ancestral gene from which it arose?

<p>Speciation (A)</p> Signup and view all the answers

What is the term for stochastic single point changes in the genetic material due to various factors, leading to slow but constant mutation rates?

<p>Mutation (B)</p> Signup and view all the answers

What percentage of genes are identical between humans and chimpanzees?

<p>99% (A)</p> Signup and view all the answers

How many nucleotide differences are there between the human and chimpanzee genomes?

<p>30,000,000 (C)</p> Signup and view all the answers

What percentage of human genes have an identical homologue in chimpanzees?

<p>29% (C)</p> Signup and view all the answers

On average, how many amino acid differences are there per gene between humans and chimpanzees?

<p>2 amino acids (C)</p> Signup and view all the answers

In a gene expression study comparing human and chimpanzee cerebral cortex, how many genes showed human-specific changes?

<p>91 (C)</p> Signup and view all the answers

What percentage of the genes that showed human-specific changes in the cerebral cortex study exhibited increased expression in humans?

<p>90% (D)</p> Signup and view all the answers

Which process involves inferring adaptive amino acid changes in proteins?

<p>Measuring selection on protein-coding genes (B)</p> Signup and view all the answers

What is the purpose of inferring lineage-specific evolution?

<p>Determine genetic and genomic changes that have made us human (A)</p> Signup and view all the answers

Which type of changes are measured when selecting 'for' particular amino acids in proteins?

<p>Non-synonymous nucleotide substitutions (C)</p> Signup and view all the answers

What does inferring ancestral states for genes involve?

<p>Determining the genetic makeup of genes in the past (D)</p> Signup and view all the answers

What is the main focus when inferring recent 'selective sweeps' in the human genome?

<p>Measuring selection on protein-coding genes (A)</p> Signup and view all the answers

'Codon usage' is most relevant to which aspect of molecular evolution?

<p>'Adaptive amino acid change' (B)</p> Signup and view all the answers

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