Some people suggest that evolution is a process that occurs in other animals but not humans. Which fur color has the greatest advantage on each substrate?ħ. How can the Hardy-Weinberg equation be used to show that a population is evolving?Ħ. How does this percentage compare to the percentages observed using the Hardy-Weinberg equation?ĥ. How many of the offspring are expected to be DD_ Dd _ dd_ Show a punnett square of two heterozygous mice crossed. (Show work!) p 2 + 2pq + q 2 = 1 and p + q = 1Ĥ. Use the Hardy-Weinberg equation, complete the table. Calculate the frequency of light colored mice and dark colored mice found on dark substrates.ģ. How quickly can natural selection work 'The Making of the Fittest: Natural Selection and Adaptation' tells the story of a living example of Darwins process of natural selection and shows how quickly a trait can spread through a population when natural selective pressure is strong. Calculate the frequency of light colored mice and dark colored mice found on light substrates.įrequency = number of mice of one color / total number of mice on that substrateįrequency of light colored mice = _ | Frequence of dark colored mice _Ģ. The data is summarized in the table below.ġ. They recorded substrate color and coat-color frequencies for six locations. Nachman and his colleagues collected rock pocket mice across 35 kilometers of Arizona Sonoran Desert, which include both dark, rocky lava patches and light, rocky granite areas. But populations of primarily dark-colored rock pocket. ![]() ![]() Because most rock pocket mice have a sandy, light-colored coat, they are able to blend in with the light color of the desert rocks and sand that they live on. Depending on environmental conditions, inherited characteristics may be advantageous, neutral, or detrimental.\)ĭr. The rock pocket mouse, Chaetodipus intermedius, is a small, nocturnal animal found in the deserts of the southwestern United States.Traits that confer an advantage may persist in the population and are called adaptations.Over time, the proportion of individuals with advantageous traits may increase (and the proportion with disadvantageous traits may decrease) due to their chances of surviving and reproducing.The first equation says that if there are only two alleles for a gene, one dominant and one recessive, then 100 of the. Inherited characteristics affect the likelihood of an organism's survival and reproduction. Two equations are used to calculate the frequency of alleles in a population, where p represents the frequency of the dominant allele and q represents the frequency of the recessive allele: p + q 1.0 and p2 + 2pq + q2 1.0.He has quantified the selective pressure imposed by predators and identified the genes involved in the adaptations of mouse populations to their substrates. New heritable traits can result from mutations. Michael Nachman studies the evolutionary processes that led to these marked differences in rock pocket mouse populations.Evolution results from natural selection acting upon genetic variation within a population. ![]() There is a fit between organisms and their environments, though not always a perfect fit.An organism's features reflect its evolutionary history.Information on controversies in the public arena relating to evolution.Alignment with the Next Generation Science Standards.The big issues – Pacing, diversity, complexity, and trends.Macroevolution – Evolution above the species level.Microevolution – Evolution within a population.Mechanisms: the processes of evolution – Selection, mutation, migration, and more.The history of life: looking at the patterns – Change over time and shared ancestors. ![]() An introduction to evolution: what is evolution and how does it work?.
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