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Explain Measuring the heritability of bill depth in populations of Darwin’s finches?

Biology (MindTap Course List)

11th Edition

ISBN:9781337392938

Author:Eldra Solomon, Charles Martin, Diana W. Martin, Linda R. Berg

Publisher:Eldra Solomon, Charles Martin, Diana W. Martin, Linda R. Berg

Chapter19: Evolutionary Change In Populations

Section19.2: The Hardy–weinberg Principle

Problem 1C: INTERPRET DATA In a population at genetic equilibrium, the frequency of the homozygous recessive...

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Ecological adaptations

An ecological adaptation is any morphological, physiological, or behavioral trait of an organism that allows it to survive and reproduce in a habitat or ecosystem. Adaptation is a biological mechanism by which an organism gradually gets more acclimated to its surroundings.

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Peter Boag, studied the inheritance of beak depth in Galapagos finches by looking at the relationship between parent beak depth (in mm) and that of their offspring. He collected two sets of parent offspring data, once in 1976 and again in 1978. For both years he followed birds to determine which pairs belonged to which nests. Most of the parents had been previously captured so their beak depths were known. He then captured the offspring when they fledged and measured their beak depth. He calculated the "midparent" beak depth (the average beak depth of the two parents) and then compared that to beak depth of their offspring. Here is what he found in 1976: Assume that in 1978, all the finches with beak depths less than 9.0 mm died due to prolonged drought. Use your knowledge of how quantitative traits respond to selection and the following relationship, R = h2S, to determine the following: Selection differential. Predicted response…
Which type of selection is represented in a population of birds where a wing span of 2ft rather than 1ft or 3ft is more beneficial? Directional Disruptive Stabalizing
Selection may also act against heterozygotes. How do allele frequencies change if the two homozygotes have equal fitness, but heterozgotes have a 50% reduced fitness? Explain what happens and why
With suitable examples, explain how mechanisms that do notinvolve adaptive traits can change allele frequency
What play an important role in speciation byaltering allele frequency ?
In light and dark forests, What impact do you think the environment has in the peppered moth population's individual survival? How does genetic frequency change throughout time? What about the frequency of allelic variation?
If a species of ground finch with variation in beak size suddenly had to all compete for large hard seeds, what kind of selection would occur on the species?
Explain the influence of gene linkage on phenotypic ratios in a population.
Calculate selection for the following scenario. In a population of prairie dogs living on a prairie, prairie dogs with genotype aa have 8 offspring per year on average, those with genotype Aa have 4 offspring per year on average, and those with genotype AA have 3 offspring per year on average. Round selection to the nearest hundredth, report selection as a value ranging from "0.00" to "1.00" Selection on genotype Aa: Selection on genotype AA: Selection on genotype aa: Which genotype has the highest fitness? Fill in the blank with homozygous dominant, heterozygous, or homozygous recessive
how does darwin finches support the arguement that genetic variation increases the survival rate or certain individuals in a population
Give typing answer with explanation and conclusion During adaptation what qualifies as the principle Darwinian "individual" in populations that are being shaped by this process?
If a population is experiencing directional selection with respect to wing color, what type of selection would you expect it to experience with respect to antenna length?