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What factors could be responsible for the size differences among modern vertebrate genomes?
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- Is it possible to clone a dinosaur? Can you support your answer with ideas/information?How, specifically, is the concept of ALLOMETRY relevant to the phylogenetic position of Homo floresiensis? Because if allometry explains the anatomy of Homo floresiensis then we can conclude that it is not separate species but instead a member of our species. Although most mammals on islands go through a process of getting smaller, Homo floresiensis evolved from a smaller ancestor to be bigger, meaning that allometry is an important factor. Mutations in the allometry allele are associated with many of the characteristics of Homo floresiensis. Because Homo floresiensis is so much smaller than other members of the genus Homo, it is important to determine how shape changes associated with smaller size impacted the species. Because Homo floresiensis had both small- and large-bodied forms, variation within the species is in large part dictated by allometry.7) Examine the image of the relatedness of vertebrates represented in this phylogenetic tree. Select all the statements that are supported by this tree. A) Gray whales are the common ancestor of the Blue and Humpback whales. B) Blue and humpback whales diverged more recently than either did from the gray whale. C) The Bryde's whale shares a more recent common ancestor with the Sei whale than with the Fin whale. D) The blue and the Bryde's whale have more traits in common with each other than with any other two species, E) Southern minke whales and Northern minke whales have more traits in common with each other than with any other species. Not Graded
- You want to make a phylogenetic tree of a group of three related species of lizards that live on an island. Their genome sequences are highly similar except for a gene that controls body size. In that region of the genome, one of the lizard species has one copy of the growth control gene (L1), the second species has a duplication of the growth control gene (L2) and the third species has three copies of the same gene (L3). The lizard species show an increase in size depending on how many copies of the growth control gene they have (L1 is smallest, L2 is medium-sized and L3 is largest). Is this enough information to determine the phylogenetic relationships between the species, and predict which of the species arrived on the island first (and is the ancestral species)? Yes, because the ancestral lizard genome probably had a single copy of the growth control gene and after arriving on the island it was duplicated, resulting in species L2, and then another duplication occurred resulting in…An adult human has a flat face with a small jaw and large cranium. An adult chimpanzee has a large jaw and small cranium. Both juvenile chimps and humans have heads similar to adult humans. Which of the following is a reasonable explanation for this pattern? Group of answer choices A) genes that modify skull shape are not expressed in chimps during development B) head shape is controlled by cytoplasmic determinants C)genes that modify skull shape are not expressed in humans during development D) chimps and humans have completely different genes controlling the formation of the headHow do the genome sequences of orangutans and gorillas helpscientists further resolve the evolutionary history of humans?
- Why do you think such a small portion of Neandertal or Denisovan DNA exists in the gene pool of modern humans? Why not more?If you are to compare the genetic sequences between monkeys and fungi, what molecular sequence are you going to use? Why? How about comparing genetic sequences of monkeys to humans, what genetic sequence will you use? Provide an explanation.The genome relatedness of different organisms can be shown with a phylogenetic tree constructed based on DNA sequence. (1) Why DNA sequences could be used to deduce genome relationship? (2) What else may be used to suggest the relatedness of different genomes?
- Based on their anatomical and behavioral differences, biologists previously placed humans and chimpanzees in different families, but now DNA sequence data suggest that they are closely related and should be placed in the same family. What are some advantages of using DNA sequences to decide how to classify organisms? What might be some disadvantages?"Neanderthals have revealed interesting elements of the human genome". What are those elements ?Examine the phylogenetic tree of several species of lizards. Zebra-tailed Lizard Western Whiptal Desert Iguana A Which two lizards will have the most similar DNA sequence? Fringe-toed Lizard and Horned Lizard Fringe-toed Lizard and Zebra-tailed Lizard Desert Iguana and Zebra-tailed Lizard Desert Iguana and Western Whiptail Fringe-toed Lizard Horned Lizard