6/7/2023 0 Comments Manyland change name![]() ![]() To be useful as an index fossil, a species must have existed for a short period of time over a wide geographic range. The fossil record shows that most organisms that ever lived on Earth are now extinct. The Galapagos finch species are an excellent example of speciation Which of the following can produce a duplicate gene? crossing-over during meiosis What do Hox genes control? patterns of embryological development A polygenic trait can have many possible genotypes, producing many possible phenotypes. What can be inferred from this information? The two species do not interbreed because of temporal isolation. Although they often live in the same habitat, the American toad breeds earlier in the spring than the Fowler's toad does. The separation of populations by barriers such as rivers, mountains, or bodies of water is called geographic isolation. The type of genetic drift that follows colonization of a new habitat by a small group of individuals is called the founder effect. In genetic drift, the allele frequencies in a gene pool change because of chance. What is most likely true about these two species? Species Y evolved for a long time separately from Species Z. Species Y and Z have very different proteins and genes. Which of the following events do biologists consider a random change? genetic drift The situation in which allele frequencies in the gene pool of a population remain constant is called genetic equilibrium The allele frequencies of a population are more likely to change if mating is not random A factor that is necessary for the formation of a new species is reproductive isolation What situation might develop in a population having some plants whose flowers open at midday and other plants whose flowers open late in the day? temporal isolation What did the Grants learn about mate choice from the Galapagos finches? Finches prefer mates with beaks similar in size to their own. If a mutation introduces a new skin color in a lizard population, which factor might determine whether the frequency of the new allele will increase? Whether the mutation makes some lizards more fit for their environment than other lizards.
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