BIO 1130 Lecture Notes - Lecture 4: Punnett Square, Mendelian Inheritance, Allele Frequency

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There is no unified description of a species. Natural selection is now called microevolution, which is slow over time. Population genetics and natural selection based on mendelian genetics (huxley) Darwin: when we look at changes don"t look at an individual, look at the population. Huxley: look at the population, and then score the frequency of an allele in a population, we should see a shift of alleles in a population. Evolutionary changes that result from changes in allele frequencies in a population, or in chromosome structure or numbers die to mutation and recombination. This change can happen in chromosome structure, pieces can break off. Phenotype does not always reflect the genetics. Allele control the appearance of organisms. Hardy and weinberg: their challenge is to figure out how a punnet square can give a prediction of frequency in a population that mates. Don"t worry about the individuals, just count up the number of alleles.

Related Questions

1- Explain the relationship between evolution, allelefrequencies, and populations.

2- Summarize the evidence Darwin used to develop his theory ofevolution by natural selection.

3- Explain the link between natural selection and reproductivesuccess.

4- Use the Hardy-Weinberg equation to calculate allele andgenotype frequencies.

5- Explain how natural selection can maintain harmful alleles ina population. List the lines of evidence that support evolutionaryhistory.

6- Explain why hard body parts are more likely to appear in thefossil record.

7- Describe two ways that the age of a fossil can bedetermined.

8- Explain how biogeography can be used to explain the evolutionof a species.

9- Compare and contrast homologous, vestigial, and analogousstructures.

10- Explain how embryonic development can reveal evolutionaryrelationships.

pearcrow571

Which of the following statements is true about the theory of evolution?

The focus of the theory of evolution is to explain the origins of life.

According to the theory of evolution, life evolved entirely randomly.

The focus of the theory of evolution is to explain how life diversified from the first living cells.

According the theory of evolution, only the strongest and toughest can survive.

Which of the following best explains our current understanding of microevolution?

Neither microevolution nor macroevolution can be observed within a human lifespan?

Microevolution is the gradual change of the genetic makeup (allele frequency) of a population over time.

Microevolution and macroevolution occur by very different mechanisms

Microevolution is the evolution of small organisms; macroevolution is the evolution of large organisms.

The Irish elk is a giant species of deer that went extinct about 5,000 B.C. They are well-known for their extremely large antlers (12 feet wide) in males. The antlers likely played some role in protection against predators, but another possible cause for their large size could be

blending genetics

sexual selection

spontaneous generation

inheritance of acquired characteristics

Cross River gorilla is listed as critically endangered species. With only 35 of these gorillas in the world, they are at risk of extinction largely due to poaching and loss to diseases such as Ebola. Genetic studies of the remaining gorillas show very little variability, because several alleles were likely lost due to ______.

		genetic drift
		gene flow
		increased rate of spontaneous mutations
		adaptive radiation

Evolution is change over ____________. Why is evolution an important concept in biology?

What is a population? How can you identify a population in nature?

What is the ultimate source of random variation in a population? Is this the only source of variation, why or why not?

What is a gene pool? Why is it important to our study of evolution?

How is variation inherited in a population? HINT: There are at least two main contributors to this variation. You should be focusing on gametes!

What is microevolution versus macroevolution?

How do the peppered moths show us microevolution in nature? Why is this NOT macroevolution? HINT: you should consider alleles and mating in your answer.

Do you believe that the Hardy-Weinberg equilibrium is common in nature? Why or why not? In your answer, you should incorporate your knowledge of populations, evolution, and genetics.

Evolution is driven by adaptation and natural selection. In populations, we refer to organisms that are âmost fit.â Explain how evolution and the environment would result in organisms that are âmost fit.â In your answer, indicate whether the âmost fitâ organism today is likely to be the âmost fitâ organism in the future and why.

Microevolution is a change in the frequency of ___________________ in a population but has not resulted in a speciation event thus far. Given this, what factors could lead to a speciation event for this population?

How would you know that a population had divided into two different species (macroevolution)? How could you test for a speciation event experimentally?

BIO 1130 Lecture Notes - Lecture 4: Punnett Square, Mendelian Inheritance, Allele Frequency

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