Natural Selection 2
... • More offspring survive to sexual maturity and reproduce (causes competition) • Some individuals have traits that are better suited to their environment – they have desirable genetic information. More likely to be passed on to future offspring ...
... • More offspring survive to sexual maturity and reproduce (causes competition) • Some individuals have traits that are better suited to their environment – they have desirable genetic information. More likely to be passed on to future offspring ...
Thurs./Fri. 5/12 – 5/13 Agenda
... adapted to their environment survive and reproduce. • Other less fit organisms have a lower chance of surviving and reproducing. • Therefore, well-adapted organisms pass on more of their genes to the next generation. • As a result the gene frequency changes from one generation to the next. ...
... adapted to their environment survive and reproduce. • Other less fit organisms have a lower chance of surviving and reproducing. • Therefore, well-adapted organisms pass on more of their genes to the next generation. • As a result the gene frequency changes from one generation to the next. ...
Artificial Selection
... Evolutionary theory deals mainly with how life changed after its origin. ...
... Evolutionary theory deals mainly with how life changed after its origin. ...
Population Evolution
... -Two processes commonly cause populations to become small enough for genetic drift to occur. ...
... -Two processes commonly cause populations to become small enough for genetic drift to occur. ...
Darwin and Evolution
... • The concept that the shuffling of genes that occur during sexual reproduction, by itself, cannot change the overall genetic makeup of a population. ...
... • The concept that the shuffling of genes that occur during sexual reproduction, by itself, cannot change the overall genetic makeup of a population. ...
Darwin and Evolution
... • The concept that the shuffling of genes that occur during sexual reproduction, by itself, cannot change the overall genetic makeup of a population. ...
... • The concept that the shuffling of genes that occur during sexual reproduction, by itself, cannot change the overall genetic makeup of a population. ...
Darwin and Evolution - KCPE-KCSE
... • The concept that the shuffling of genes that occur during sexual reproduction, by itself, cannot change the overall genetic makeup of a population. ...
... • The concept that the shuffling of genes that occur during sexual reproduction, by itself, cannot change the overall genetic makeup of a population. ...
Chapter 16
... • Short toes are great for push off during running (toes are for balance too) • The pinky toes – are not used for running…so it may be possible that people may start being born without them… ...
... • Short toes are great for push off during running (toes are for balance too) • The pinky toes – are not used for running…so it may be possible that people may start being born without them… ...
Coevolution (read and know!)
... Convergent Evolution • Produces analogous structures like the dolphin’s fluke and a fish’s tail ...
... Convergent Evolution • Produces analogous structures like the dolphin’s fluke and a fish’s tail ...
Natural Selection
... Natural selection is not the only source of evolutionary change Genetic drift – random change in allele frequency In small populations, individuals that carry a particular allele may leave more descendants than other individuals, just by chance. ...
... Natural selection is not the only source of evolutionary change Genetic drift – random change in allele frequency In small populations, individuals that carry a particular allele may leave more descendants than other individuals, just by chance. ...
Genetic Engineering
... because there is only one code for life • The set of instructions for which a gene is responsible work whichever organism the gene is in, e.g. a gene for luminescence from a jellyfish can be added to a frog, making it ...
... because there is only one code for life • The set of instructions for which a gene is responsible work whichever organism the gene is in, e.g. a gene for luminescence from a jellyfish can be added to a frog, making it ...
CHAPTER 23
... i. The mean of the characteristic in the population will shift towards the right. ii. Two different gene pools will develop, each responding to different environmental selection pressures. This could lead to other changes in the gene pool of each population and eventually speciation. ...
... i. The mean of the characteristic in the population will shift towards the right. ii. Two different gene pools will develop, each responding to different environmental selection pressures. This could lead to other changes in the gene pool of each population and eventually speciation. ...
The Evolution of Populations AP Biology Notes I. Overview: The Sma
... fur length in mammals or the running speed of animals fleeing predators. ...
... fur length in mammals or the running speed of animals fleeing predators. ...
evolution
... Gene pool – consists of all the genes that are present in a population Relative frequency – the number of times that an allele occurs in a gene pool Ex. In a mouse population, the dominant allele for black fur may appear 40% and the recessive allele for ...
... Gene pool – consists of all the genes that are present in a population Relative frequency – the number of times that an allele occurs in a gene pool Ex. In a mouse population, the dominant allele for black fur may appear 40% and the recessive allele for ...
this Variation worksheet
... on which natural selection acts. The random orientation, crossing-over and mutation are random processes. The natural selection of a particular phenotype is not. This topic requires us to regard sexually reproducing populations as genetically diverse and that diversity within the population changes ...
... on which natural selection acts. The random orientation, crossing-over and mutation are random processes. The natural selection of a particular phenotype is not. This topic requires us to regard sexually reproducing populations as genetically diverse and that diversity within the population changes ...
Mechanisms of Evolution Study Guide
... b. All of the different species in one environment will all have the same adaptations to survive in that environment. c. An adaptation that is favorable in an environment today, will always be favorable in that environment. ...
... b. All of the different species in one environment will all have the same adaptations to survive in that environment. c. An adaptation that is favorable in an environment today, will always be favorable in that environment. ...
Ch 21 PP slides
... Natural selection favors organisms that best fit the current environment Random events can have major influence on natural selection ...
... Natural selection favors organisms that best fit the current environment Random events can have major influence on natural selection ...
Conservation and extinction
... • Fitness reduction in the offspring = inbreeding depression • Most severe in large populations since rare alleles can persist as “het” individuals • Damaging to the offspring but not so much for a population ...
... • Fitness reduction in the offspring = inbreeding depression • Most severe in large populations since rare alleles can persist as “het” individuals • Damaging to the offspring but not so much for a population ...
How do we know the population is evolving?
... something is not true—in order to prove something else is true! This is why HardyWeinberg principle is so convenient. ...
... something is not true—in order to prove something else is true! This is why HardyWeinberg principle is so convenient. ...
File
... b. were the result of lightning striking early Earth. c. acted as barriers between organic molecules and the environment. d. served as the genetic material on early Earth. ____ 24. Gene flow __________. a. causes populations to diverge from each other b. prevents the spread of alleles (traits) throu ...
... b. were the result of lightning striking early Earth. c. acted as barriers between organic molecules and the environment. d. served as the genetic material on early Earth. ____ 24. Gene flow __________. a. causes populations to diverge from each other b. prevents the spread of alleles (traits) throu ...
Chapter 13 - UM Personal World Wide Web Server
... C.) Populations may be isolated from one another (with little interbreeding), or individuals within populations may interbreed D.) A gene pool is the total collection of genes in a population at any one time E.) Microevolution is a change in the relative frequencies of alleles in a gene pool over ti ...
... C.) Populations may be isolated from one another (with little interbreeding), or individuals within populations may interbreed D.) A gene pool is the total collection of genes in a population at any one time E.) Microevolution is a change in the relative frequencies of alleles in a gene pool over ti ...
Chapter 13 DARWIN`S THEORY OF EVOLUTION
... C.) Populations may be isolated from one another (with little interbreeding), or individuals within populations may interbreed D.) A gene pool is the total collection of genes in a population at any one time E.) Microevolution is a change in the relative frequencies of alleles in a gene pool over ti ...
... C.) Populations may be isolated from one another (with little interbreeding), or individuals within populations may interbreed D.) A gene pool is the total collection of genes in a population at any one time E.) Microevolution is a change in the relative frequencies of alleles in a gene pool over ti ...
Topic guide 7.7: Genes and evolution
... The gene for determining ABO blood group is on chromosome 9. It has six exons (expressed lengths of DNA) and five introns (inexpressed lengths of DNA) and codes for an enzyme, galactosyl transferase, that catalyses the formation of the glycolipid markers on red blood cell surface membranes. The A al ...
... The gene for determining ABO blood group is on chromosome 9. It has six exons (expressed lengths of DNA) and five introns (inexpressed lengths of DNA) and codes for an enzyme, galactosyl transferase, that catalyses the formation of the glycolipid markers on red blood cell surface membranes. The A al ...
Grade 11 Genetics Review
... d) to produce identical cells to treat disease e) to repopulate endangered species 5. What are haploid and diploid cells? Where is each cell type found? 6. Describe what the terms dominant and recessive mean. How are they used to describe the forms of a trait at the genotype level and at the phenoty ...
... d) to produce identical cells to treat disease e) to repopulate endangered species 5. What are haploid and diploid cells? Where is each cell type found? 6. Describe what the terms dominant and recessive mean. How are they used to describe the forms of a trait at the genotype level and at the phenoty ...
Population genetics
Population genetics is the study of the distribution and change in frequency of alleles within populations, and as such it sits firmly within the field of evolutionary biology. The main processes of evolution (natural selection, genetic drift, gene flow, mutation, and genetic recombination) form an integral part of the theory that underpins population genetics. Studies in this branch of biology examine such phenomena as adaptation, speciation, population subdivision, and population structure.Population genetics was a vital ingredient in the emergence of the modern evolutionary synthesis. Its primary founders were Sewall Wright, J. B. S. Haldane and Ronald Fisher, who also laid the foundations for the related discipline of quantitative genetics.Traditionally a highly mathematical discipline, modern population genetics encompasses theoretical, lab and field work. Computational approaches, often utilising coalescent theory, have played a central role since the 1980s.