BIOLOGY 160 Lecture OBJECTIVES Assessment 5
... 10. Explain gene frequency and genotype ratios. 11. What is meant by gene pool? 12. Know when the Hardy-Weinberg law fails and why. 13. Explain genetic drift. 14. Explain the bottle neck effect and the founder effect and how they change and modify populations. 15. Explain gene flow and how it contri ...
... 10. Explain gene frequency and genotype ratios. 11. What is meant by gene pool? 12. Know when the Hardy-Weinberg law fails and why. 13. Explain genetic drift. 14. Explain the bottle neck effect and the founder effect and how they change and modify populations. 15. Explain gene flow and how it contri ...
Study Notes
... What does the dashed line represent? _______________________ What does the solid represent? ____________________________ **You will notice the dashed line and solid line on the graphs in the next examples** ...
... What does the dashed line represent? _______________________ What does the solid represent? ____________________________ **You will notice the dashed line and solid line on the graphs in the next examples** ...
Chapter 13 Notes - Great Neck Public Schools
... survival depends on their traits. 4. If an organism gets the chance to reproduce, these traits will be passed on (inherited). ...
... survival depends on their traits. 4. If an organism gets the chance to reproduce, these traits will be passed on (inherited). ...
Evidence from the gnarly New Zealand snails for and against the red
... models, if any, can explain the maintenance of additive genetic variation under strong female choice for male traits? Describe the Hamilton and Zuk hypothesis. What is meant by condition-dependent mate choice? 15. Can you suggest a way that run-away sexual selection could lead to speciation? 16. Giv ...
... models, if any, can explain the maintenance of additive genetic variation under strong female choice for male traits? Describe the Hamilton and Zuk hypothesis. What is meant by condition-dependent mate choice? 15. Can you suggest a way that run-away sexual selection could lead to speciation? 16. Giv ...
Evolution: The Origin of the Species
... Usually 2 types of finch were located on an island but 1 type was more dominant major difference between finches was beak size; shape beaks were deciding tool in success failure of birds to survive beaks were primary tool for food ...
... Usually 2 types of finch were located on an island but 1 type was more dominant major difference between finches was beak size; shape beaks were deciding tool in success failure of birds to survive beaks were primary tool for food ...
Chapter 11 Vocabulary Practice
... D. Do-It Yourself Matching In a random order, write short definitions for each term on the blank lines to the right. Then give your paper to a classmate who should write the number of the term next to the correct definition. ...
... D. Do-It Yourself Matching In a random order, write short definitions for each term on the blank lines to the right. Then give your paper to a classmate who should write the number of the term next to the correct definition. ...
Exam Review
... • Different species that do not share a recent common ancestor have evolved similar traits because they experience the same selective pressures (analogous features) Ex. 1 Eyes of spiders and humans Ex. 2 Streamlined body shape of sharks and dolphins ...
... • Different species that do not share a recent common ancestor have evolved similar traits because they experience the same selective pressures (analogous features) Ex. 1 Eyes of spiders and humans Ex. 2 Streamlined body shape of sharks and dolphins ...
Core Idea LS4 Vocab. Biological Evolution: Unity and Diversity How
... reproductive isolation evolve speciation Natural selection is the result of four factors: o (1) the potential for a species to increase in number, o (2) the genetic variation of individuals in a species due to mutation and sexual reproduction, o (3) competition for an environment’s limited supply of ...
... reproductive isolation evolve speciation Natural selection is the result of four factors: o (1) the potential for a species to increase in number, o (2) the genetic variation of individuals in a species due to mutation and sexual reproduction, o (3) competition for an environment’s limited supply of ...
Answer Key Chapter 13
... 2. Complete the following table, which compares the different mechanisms of microevolution. Natural selection Description The ability of some organisms to leave more offspring than others due to an advantageous trait ...
... 2. Complete the following table, which compares the different mechanisms of microevolution. Natural selection Description The ability of some organisms to leave more offspring than others due to an advantageous trait ...
sexual dimorphism - Glenelg High School
... larger population and this smaller group forms a new population with a new gene pool that is not reflective of the original population. Could occur from a bottleneck or when a small group colonizes a location. ...
... larger population and this smaller group forms a new population with a new gene pool that is not reflective of the original population. Could occur from a bottleneck or when a small group colonizes a location. ...
25.3 Natural selection
... 25.3 Natural selection 3. Individuals that survive can reproduce and pass their characteristics to the next generation before they die. 4. After a very long period of time, a group of individuals that once belonged to the same species may separate into different kinds of species – ...
... 25.3 Natural selection 3. Individuals that survive can reproduce and pass their characteristics to the next generation before they die. 4. After a very long period of time, a group of individuals that once belonged to the same species may separate into different kinds of species – ...
Name Date ______ Chapter 22: Descent with Modification: A
... time, his thinking has been influential. What is considered to be the great importance of his ideas? ...
... time, his thinking has been influential. What is considered to be the great importance of his ideas? ...
Natural Selection and Evidence for Evolution
... II. Alfred Wallace A. 25 years after Darwin returned from the Galapagos, Wallace sends him an essay. B. The essay was about evolution. C. Darwin published his book immediately. D. Darwin and Wallace present their info to other scientists and it became controversial ...
... II. Alfred Wallace A. 25 years after Darwin returned from the Galapagos, Wallace sends him an essay. B. The essay was about evolution. C. Darwin published his book immediately. D. Darwin and Wallace present their info to other scientists and it became controversial ...
Lecture Outline for exam 1
... There is a struggle for survival and most offspring do not survive Natural Selection: individuals having any advantageous trait have the best chance of survival; individuals with a disadvantageous trait will be destroyed in the struggle for survival Only surviving individuals can pass on their ...
... There is a struggle for survival and most offspring do not survive Natural Selection: individuals having any advantageous trait have the best chance of survival; individuals with a disadvantageous trait will be destroyed in the struggle for survival Only surviving individuals can pass on their ...
File - Biology with Ms. Murillo
... slower rate than population 2. Darwin read Malthus’s essay after he returned from his voyage 3. Darwin concluded that all organisms produce more offspring than the environment can support ...
... slower rate than population 2. Darwin read Malthus’s essay after he returned from his voyage 3. Darwin concluded that all organisms produce more offspring than the environment can support ...
On Social Darwinism of Today
... worrying sincerely about ordinary people deserted by the latter? Charles Darwin says in his work On the Origin of Species: “Although new and important modifications may not arise from reversion and analogous variation, such modifications will add to the beautiful and harmonious diversity of nature.” ...
... worrying sincerely about ordinary people deserted by the latter? Charles Darwin says in his work On the Origin of Species: “Although new and important modifications may not arise from reversion and analogous variation, such modifications will add to the beautiful and harmonious diversity of nature.” ...
File
... ex) Desert foxes have large ears, which radiate heat. Arctic foxes have small ears, which conserve body heat. Darwin’s theory of natural selection 1. Individuals in a population vary in their traits, many of which are heritable 2. A population can produce far more offspring than can survive. Wit ...
... ex) Desert foxes have large ears, which radiate heat. Arctic foxes have small ears, which conserve body heat. Darwin’s theory of natural selection 1. Individuals in a population vary in their traits, many of which are heritable 2. A population can produce far more offspring than can survive. Wit ...
Evolution: Chapters 15-17
... 5. ____________________Selection - nature chooses which traits are best suited by selecting against certain characteristics; it is the most disruptive factor to genetic equilibrium Nature chooses in 3 different ways... 1) ___________________________________- Average trait has the advantage Example: ...
... 5. ____________________Selection - nature chooses which traits are best suited by selecting against certain characteristics; it is the most disruptive factor to genetic equilibrium Nature chooses in 3 different ways... 1) ___________________________________- Average trait has the advantage Example: ...
evolution - Fulton County Schools
... Example: Approximately 75% have dominant allele for tongue rolling. 25% non-rolling Genetic Equilibrium: This exists when the frequency of alleles remains the same over generations. The population is not evolving. ...
... Example: Approximately 75% have dominant allele for tongue rolling. 25% non-rolling Genetic Equilibrium: This exists when the frequency of alleles remains the same over generations. The population is not evolving. ...
NATURAL SELECTION AND THE EVIDENCE FOR EVOLUTION
... • E. Darwin Explains Natural Selection • In nature, more offspring than can survive are produced • In any population, individuals have variations • Over time, those with favorable variations survive and pass those traits on to their offspring • Over time, individuals with variations look entirely di ...
... • E. Darwin Explains Natural Selection • In nature, more offspring than can survive are produced • In any population, individuals have variations • Over time, those with favorable variations survive and pass those traits on to their offspring • Over time, individuals with variations look entirely di ...
Natural Selection Notes
... After talking to local farmers, Charles Darwin discovered that the farmers had been using artificial selection for centuries. The farmers and ranchers never allowed their stock to reproduce on their own. Instead the farmers and ranchers always allowed their best plants and animals to reproduce, but ...
... After talking to local farmers, Charles Darwin discovered that the farmers had been using artificial selection for centuries. The farmers and ranchers never allowed their stock to reproduce on their own. Instead the farmers and ranchers always allowed their best plants and animals to reproduce, but ...
EARTH HISTORY
... Natural Selection Charles Darwin & Alfred Wallace believed that organisms change over time by natural selection. ...
... Natural Selection Charles Darwin & Alfred Wallace believed that organisms change over time by natural selection. ...
Objective 1
... organisms into a constant “struggle for existence”, both against the environment and against each other. Plant stems grow tall in search of sunlight; plant roots go deep in the soil in search of water and nutrients. Animals compete for food and space in which to build nests and raise young. But who ...
... organisms into a constant “struggle for existence”, both against the environment and against each other. Plant stems grow tall in search of sunlight; plant roots go deep in the soil in search of water and nutrients. Animals compete for food and space in which to build nests and raise young. But who ...
Natural selection
Natural selection is the differential survival and reproduction of individuals due to differences in phenotype; it is a key mechanism of evolution. The term ""natural selection"" was popularised by Charles Darwin, who intended it to be compared with artificial selection, now more commonly referred to as selective breeding.Variation exists within all populations of organisms. This occurs partly because random mutations arise in the genome of an individual organism, and these mutations can be passed to offspring. Throughout the individuals’ lives, their genomes interact with their environments to cause variations in traits. (The environment of a genome includes the molecular biology in the cell, other cells, other individuals, populations, species, as well as the abiotic environment.) Individuals with certain variants of the trait may survive and reproduce more than individuals with other, less successful, variants. Therefore, the population evolves. Factors that affect reproductive success are also important, an issue that Darwin developed in his ideas on sexual selection, which was redefined as being included in natural selection in the 1930s when biologists considered it not to be very important, and fecundity selection, for example.Natural selection acts on the phenotype, or the observable characteristics of an organism, but the genetic (heritable) basis of any phenotype that gives a reproductive advantage may become more common in a population (see allele frequency). Over time, this process can result in populations that specialise for particular ecological niches (microevolution) and may eventually result in the emergence of new species (macroevolution). In other words, natural selection is an important process (though not the only process) by which evolution takes place within a population of organisms. Natural selection can be contrasted with artificial selection, in which humans intentionally choose specific traits (although they may not always get what they want). In natural selection there is no intentional choice. In other words, artificial selection is teleological and natural selection is not teleological.Natural selection is one of the cornerstones of modern biology. The concept was published by Darwin and Alfred Russel Wallace in a joint presentation of papers in 1858, and set out in Darwin's influential 1859 book On the Origin of Species, in which natural selection was described as analogous to artificial selection, a process by which animals and plants with traits considered desirable by human breeders are systematically favoured for reproduction. The concept of natural selection was originally developed in the absence of a valid theory of heredity; at the time of Darwin's writing, nothing was known of modern genetics. The union of traditional Darwinian evolution with subsequent discoveries in classical and molecular genetics is termed the modern evolutionary synthesis. Natural selection remains the primary explanation for adaptive evolution.