In a population of yellow mushrooms, a mutation resulted in a new purple type of mushroom that herbivores avoided. Because herbivores avoided the purple mushrooms, they were able to spread more spores and increased to make up 1% of the population. In one year, however, flash flood killed all of the purple mushrooms in the population, leaving only a few yellow mushrooms alive. Identify which evolutionary mechanism was responsible for the fixation of the yellow mushroom genotype in this population. Select one: a. Mutation b. Genetic drift c. Non-random mating Ⓒd. Natural selection * Gene flow e.

The diagram below represents the ranges of 3 species (A, B, and C), which are separated by a mountain range and river. It has been hypothesized that these three species arose via vicariance ecological speciation. Specifically, the entire area was originally occupied by a single species. Its range was split first by the mountain range. Later, the river formed, separating populations on the eastern side of the mountains. If this hypothesis is correct, phylogenetic analysis should reveal that: NIS 4 44444 U LEL B All three species are equally related to each other. Species A and B are each other's closest relatives (sister taxa). Species B and C are each other's closest relatives (sister taxa). Species A and Care each other's closest relatives (sister taxa).

Imagine you were to collect data from simulation 2 (negative selective pressure on SS genotypes) over five generations. The frequency of the S allele over time is graphed below. The graph shows a rapid decrease in the sickle cell allele frequency in the first generation but a slower decrease in later generations. By the fifth generation, the allele is not completely eliminated from the population. Provide two plausible explanations for why the S allele persists after five generations.

Once upon a time there was a population of hippies living in an isolated commune called Gone. They had been there for generations, and all members were homozygous for a gene that gave them a preference for crafting necklaces out of green beads, so that every individual had the genotype GG at this locus. In another isolated commune, called Yonder, was a population of hippies that had a genetic propensity for making necklaces out of yellow beads, and everyone was homozygous for a different allele at the same genetic locus; their genotype was YY. Last year (prior to our current social isolating) everyone repaired their W buses, and a giant gathering in celebration of the 50th anniversary was held at the Oregon Country Fair. The next few questions will ask you about these two populations that came together at the fair. Genotype Observed Expected (0-E) (0-E)2 (O-E)?/E GG 81 79.2 81-79.2-1.8 1.82=3.24 3.24/79.2=0.04 12.96/105.6=0. GY 102 105.6 102-105.6=-3.6 -3.62=12.96 12 YY 37 35.2…

Use each of the following species concepts to write a claim about whether the dark and light fur mice are, in fact, different species. Your claim should demonstrate your understanding of that particular species concept. Mice with light coat colors are found in populations scattered across the southeastern US. Researchers believe the light coat color emerged in a single population.   How would a biologist explain the evolution of the light coat color in populations across the southeastern US? Briefly explain your reasoning.

Grouse in Russia show a recessive mutation “short-tail” that causes problems in the control of direction when flying. In 2002 a survey  of a large, freely interbreeding, population of 1,856 grouse revealed 142 with short tail feathers. What proportion of the grouse population would you expect to be heterozygous at the short-tail locus ?

For the image attached did the moth population evolve? Explain. Is it micro or macroevolution?

Suppose a population of mice is subject to a few years of very cold, dry winters that drastically decreases their numbers. After the decrease in population size, there was a population of 200 mice, with 182 showing the dominant long tail phenotype and 18 showing the recessive short tail phenotype. a. What is the frequency of the recessive allele? b. What is the frequency of the dominant allele?