25 Jul WHAT PERCENTAGE OF GENES DO PLANTS ANIMALS AND FUNGI HAVE IN COMMON?
Genes may duplica Show more How can extremely similar organisms develop through very different stages? Genes may duplicate. Developmental patterns are random events. Several hundred genes must be mutated in order to produce developmental changes. Very minor changes in only a few genes can produce big developmental changes. Small genes can produce large changes. Which of the following statements is true? Larger genomes always have more genes than smaller genomes. Larger genomes always have fewer genes than smaller genomes. Genome size typically correlates with gene number. Gene number correlates with the complexity of the organism. None of the above is true. What percentage of genes do plants animals and fungi have in common? 30% 50% 70% 90% 95% What led to the establishment of broccoli and cauliflower as common plants in society? natural selection because they are more fit continual mutation artificial (human) selection by cultivation well-documented phylogeny beneficial genes Sequence comparisons between different organisms identify differences in specific genes. What is needed to demonstrate that these sequence differences are the cause of phenotypic differences? a correlation at least two mutations per gene experiments to demonstrate a functional difference two organisms with the same mutation Both b and d are correct. Which of the following organisms has the most junk DNA? human mosquito Both have the same amount. Neither has any. We dont knowneither genome has been sequenced yet. What event led to the development of broccoli and cauliflower? mutation of a flower producing gene mutation of a leaf producing gene mutation of hundreds of genes mutation of Hox genes selective breeding of cabbage plants 8. Of the genomes sequenced to date what type of organism has the most genes? yeast fruit fly human mouse rice 9. If a mutation changes which cells in an embryo produce a particular signally receptor the most likely change in development would be an example of which of the following? symmetrical change homologous change heterochronic change homeotic change convergent change 10. Why do biologists believe that animal eyes developed independent of each other homoplastically? The eyes of several different animals are very different. All animals have eyes. Some animals dont have eyes. A half-developed eye is not advantageous. The eyes of ribbon worms are very similar to the eyes of mammals. 11. Cichlid fish have one of three morphologically different jaws. These three varieties result from what? different genes slightly different versions of one or two genes environmental effects during development global warming lethal mutations Show less
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