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Welche der folgenden Pflanzen ist ein Wolfsmilchgewächs ?

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in eastern grey squirrels, the allele for black fur (B) is dominant to the allele for grey fur (b). in a particular population of grey squirrels, 64% have black fur and 36% have grey fur. a researcher calculated the allelic frequencies to be B = 0.4 and b = 0.6. five years later, the researcher returned to the location and determined the allelic frequencies within the squirrel population to be B = 0.6 and b = 0.4. which of the following could best explain the increase in the frequency of the allele in the population after five years?a) the frequency of the B allele increased because it is the dominant alleleb) the frequency of the B allele increased because squirrels with grey fur exhibited greater fitnessc) the frequency of the B allele increased due to the selective pressures of the environmentd) the frequency of the b allele increased because black squirrels randomly mate with other eastern grey squirrels

which of the following statements regarding speciation is correct?a) speciation occurs so slowly the scientists have never observed the emergence of a new species.b) speciation only occurs slowly. small genetic changes accumulate from generation to generation.c) speciation can occur as a result of changes in a single gene.d) speciation requires the geographic isolation of a small population from a larger parent population.

in certain african countries, 4% of the newborn babies have sickle cell anemia which is caused by a recessive version of the hemoglobin gene. out of a random population of 10,000 newborn babies how many would be expected to be homozygous for the normal, dominant hemoglobin genotype, assuming hardy weinberg equilibrium?a) 400b) 3200c) 6400d) 9600

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