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Genetics

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How did Darwin explain the differences in beak shape among Galapagos finches?
Natural selection uses random genetic changes, it cannot anticipate future needs.
Darwin put together several pieces of information when creating his theory of evolution. Which of the following is not part of the information?Organisms can be specifically adapted to the environments in which they liveIndividuals in a population can pass traits they acquire during their lives to their offspringpopulations produce more offspring than the environment can sustainwithin populations individuals can have variable phenotypes
In a population of 1000 snails, tests of snail color genes show that 160 snails are AA, 480 are Aa and 360 are aa. What is the frequency of the A allele in this population?
In a Hardy-Weinberg population with two alleles, A and a, that in are in equilibrium, the frequency of the allele a is .7. What is the percentage of the population that is heterozygous for this allele?
The wing of the bat and the fore-limb of the dog are said to be homologous structures. What does this mean?
The majority of human babies are 7lbs at birth. This is an example of ?
What is most speciation thought to be the result of?
In_______species diverge at a slow, steady pace while in________, species diverge quickly and then remain unchanged for long periods of time.
________evolution occurs when_________related species become different over time and_________evolution occurs when_________related species become more similar over time.
______speciation involves geographic separation of a population while______speciation occurs in a population in the same location
Diversity is understood to be a result of genetic variation. Sources of variation include all the following except?recombination by crossing over in meiosismistakes in DNA replicationrecombination at fertilizationmistakes in translation of structural genestranslocations and mistakes in meiosis
Two species of wild lettuce grow in the same areas, but one flowers in early spring and the other flowers in summer. What is this is an example of?
Populations can be evolving at some loci but be at Hardy-Weinberg equilibrium at other loci.
Each individual in a population of diploid organisms can carry up to__________alleles for a particular gene.
What is the primary influencing factor on the rate of speciation?
Which type of selection is most likely to result in sympatric speciation?
Convergent evolution occurs when closely related organisms become more similar over long periods of time.
What must be true in order for individuals best suited for growth and reproduction in a particular environment to contribute disproportionately to the next generation?
Hybrid zones can result in one of three possible outcomes. For each of the scenarios, choose the appropriate outcome: - reproductive barriers weaken (B)- decreased fitness of the hybrids (C)- hybrids are equally fit (A)

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