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- How are the striking similarities among genes that govern development in widely differing species strong evidence for evolution?How does evidences from embryology support evolution?Many species look similar as embryos. What causes them to appear different as adults? Why does the study of development give insights into evolutionary relationships?
- What evolutionary insights might you gain if you compare the transcriptomes of cells from the limb buds of human and non-human primates?If natural selection can only operate on existing variants, where does all that variation come from? If, as Darwin (1868) and Huxley concluded, variation arose from changes in development, then how could the development of an embryo change when development is so finely tuned and complex?The sequence of genes in a hypothetical animal cell is normally A-B-C-D. This results in normal development. Due to a mutation, the genes change position (A-C-D-B) resulting in abnormal development. This research was originally conducted and verified by which biologist?
- How does embryology support evolution?First, concerningthe evolution of development, what have been the changes in developmentalmechanisms that give rise to different phenotypes? A second question, closelyrelated to the first, is how do genetic differences among species map onto phenotypic differences? Third, what is the role of development in either constraining or enhancing evolutionary change in characters? That is, how does development affect “evolvability”? Fourth, how does developmental information help usidentify homologous characters, or even define homology? Finally, can understanding development help us understand the origin of novel characteristics?There are two hypotheses to explain the pattern of Human Evolution: 1) Progressive Evolution of a Single Lineage ; 2) Evolutionary Radiation Which of these hypotheses are supported by evidence, and briefly explain why? Please explain in details
- What is a gene? Why are regulatory genes important to the evolutionary process? What is a mutation as defined in this course and readings. Are the end results of a mutation always "good" or always "bad"? Or is a mutation perhaps neither always good or always bad and could be "neutral or no effect" or "adaptive" in some situations? Does it depend on the gene, amino acid, protein, and case-by-case scenario? What genetic evidence suggests that humans are a part of a biological continuum with all life forms. Does the number of genes in a biological organism correlate, predict, or denote the complexity of the organism? Does the number of chromosomes in a biological organism correlate, predict, or denote the complexity of the organism?What is the common ground between evolutionary biologists and developmental biologists who have adopted the perspective known as Evo Devo?What embryological evidences support the theory of evolution?