Biology 11AP Chapter 24 The Origins of Species p. 488 Essential
... What is speciation? Also referred to as macroevolution in which new species evolve. It also explains the differences and similarities between species. __ How does the DNA of this flightless cormorant from the Galapagos Islands compare to the DNA of cormorants from the west coast of South America? Si ...
... What is speciation? Also referred to as macroevolution in which new species evolve. It also explains the differences and similarities between species. __ How does the DNA of this flightless cormorant from the Galapagos Islands compare to the DNA of cormorants from the west coast of South America? Si ...
The Creation of New Species Through Evolution
... Sympatric Speciation Formation of a new species without geographic isolation. Causes: – Pre-zygotic barriers exist to mating – Polyploidy (only organism with an even number of chromosomes are fertile…speciation occurs quickly) – Hybridization: two different forms of a species mate in common ground ...
... Sympatric Speciation Formation of a new species without geographic isolation. Causes: – Pre-zygotic barriers exist to mating – Polyploidy (only organism with an even number of chromosomes are fertile…speciation occurs quickly) – Hybridization: two different forms of a species mate in common ground ...
Chapter 4 Evolution, Biological Communities & Species Interactions
... Differential reproduction • a phenomenon that show that some individuals reproduce more than others • this is a product of individual adaptation. The genes are being passed on… where someone else’s genes are not • this leads to the gradual modification of the gene pool because certain genes become ...
... Differential reproduction • a phenomenon that show that some individuals reproduce more than others • this is a product of individual adaptation. The genes are being passed on… where someone else’s genes are not • this leads to the gradual modification of the gene pool because certain genes become ...
How do we know evolution is a thing? 1) Fossil record:variations
... - Natural selection is how organisms with specific traits/adaptations are selected for or against in an environment (those that have the more useful traits are able to reproduce and pass on said traits = survival of the fittest) - occurs because competition, genetic variation, and limiting fa ...
... - Natural selection is how organisms with specific traits/adaptations are selected for or against in an environment (those that have the more useful traits are able to reproduce and pass on said traits = survival of the fittest) - occurs because competition, genetic variation, and limiting fa ...
Document
... animals for breeding which accelerates this 2. Stabilizing Selection: intermediate forms of a trait have high fitness while the extremes are selected against Ex. birth weight/size of organisms 3. Disruptive Selection: environment favors both extremes of a trait (opposite of stabilizing selection) Ex ...
... animals for breeding which accelerates this 2. Stabilizing Selection: intermediate forms of a trait have high fitness while the extremes are selected against Ex. birth weight/size of organisms 3. Disruptive Selection: environment favors both extremes of a trait (opposite of stabilizing selection) Ex ...
Biology 102 Lecture 16: Macroevolution 16: Macroevolution
... Biology 102 Lecture 16: Macroevolution ...
... Biology 102 Lecture 16: Macroevolution ...
Topic 4: Wearing Your Genes Continuous vs. Discrete Variation
... Dominant trait: an inherited trait that shows up in the offspring. Recessive an inherited trait that shows up in the offspring only if both parents passed on the genes for the trait; when mixed with genes for a dominant trait, a recessive trait does not show up in the offspring. Mutations: Mutatio ...
... Dominant trait: an inherited trait that shows up in the offspring. Recessive an inherited trait that shows up in the offspring only if both parents passed on the genes for the trait; when mixed with genes for a dominant trait, a recessive trait does not show up in the offspring. Mutations: Mutatio ...
Slide 1
... Macroevolution is the origin of new taxonomic groups, as opposed to microevolution, which is genetic variation between generations within a species. What is a species? 1. Biological species concept ...
... Macroevolution is the origin of new taxonomic groups, as opposed to microevolution, which is genetic variation between generations within a species. What is a species? 1. Biological species concept ...
Speciation - El Camino College
... finches from breeding with each other? Min 11:55- 14:00 A. They watched which birds were mating with each other and listened for the songs the birds were singing. B. They recorded birds singing on the island of Daphne Major for an entire breeding season to see which type of song was used more often ...
... finches from breeding with each other? Min 11:55- 14:00 A. They watched which birds were mating with each other and listened for the songs the birds were singing. B. They recorded birds singing on the island of Daphne Major for an entire breeding season to see which type of song was used more often ...
2245_notes_03_17
... What mechanisms cause populations to diverge? 1.) genetic drift 2.) different selective pressures ...
... What mechanisms cause populations to diverge? 1.) genetic drift 2.) different selective pressures ...
Lecture Outline
... b. Attempting to determine whether similar, yet different, animals are the same species by appearance (phenotype) is not reliable due to the subtle variations that are displayed. 2. The biological species concept relies on reproduction to define relatedness of species. a. Ernst Mayer says, "Species ...
... b. Attempting to determine whether similar, yet different, animals are the same species by appearance (phenotype) is not reliable due to the subtle variations that are displayed. 2. The biological species concept relies on reproduction to define relatedness of species. a. Ernst Mayer says, "Species ...
Term 2 Review ?s Answer key
... 86. A group of individuals of the same species living in the same place at the same time. 87. Natural selection. Gene flow. Genetic drift. Mutation. 88. Such as with Darwin’s finches, each island’s finches possessed slightly different characteristics, the finches (per island) each have a slight ...
... 86. A group of individuals of the same species living in the same place at the same time. 87. Natural selection. Gene flow. Genetic drift. Mutation. 88. Such as with Darwin’s finches, each island’s finches possessed slightly different characteristics, the finches (per island) each have a slight ...
Self-Study Problems #2: Speciation and Mendelian
... 2. According to the biological species concept, what allows species to remain different from each other, or evolve further apart? Reproductive isolation between the species OR Lack of gene flow between the species OR There is no exchange of genes between the species 3. According to the ecological sp ...
... 2. According to the biological species concept, what allows species to remain different from each other, or evolve further apart? Reproductive isolation between the species OR Lack of gene flow between the species OR There is no exchange of genes between the species 3. According to the ecological sp ...
Evolution Unit Review
... 2. Individuals in a population vary extensively from each other, mostly due to inheritance. 3. Struggle to survive: individuals whose inherited characteristics best fit to environment leave more offspring than less fit. 4. Unequal ability of individuals to survive and reproduce leads to gradual chan ...
... 2. Individuals in a population vary extensively from each other, mostly due to inheritance. 3. Struggle to survive: individuals whose inherited characteristics best fit to environment leave more offspring than less fit. 4. Unequal ability of individuals to survive and reproduce leads to gradual chan ...
Selective Breeding - hicksvillepublicschools.org
... disease combined the ________ resistance of one plant __________ with the ______________ food-producing _________ capacity of another. 1872 - American horticulturist Luther Burbank (1849-1926) developed a special potato. Burbank, while trying to improve the Irish potato, developed a hybrid that was ...
... disease combined the ________ resistance of one plant __________ with the ______________ food-producing _________ capacity of another. 1872 - American horticulturist Luther Burbank (1849-1926) developed a special potato. Burbank, while trying to improve the Irish potato, developed a hybrid that was ...
Population Genetics, Speciation, and Classification
... form of a trait have greater fitness than individuals with an average form of the trait. ...
... form of a trait have greater fitness than individuals with an average form of the trait. ...
27. Introduction to speciation, allopatric speciation
... • Species are a reproductive community • Composed of number of populations • Gene pool of species contains substantial genetic variation • Gene flow within and among populations is a strong cohesive force ...
... • Species are a reproductive community • Composed of number of populations • Gene pool of species contains substantial genetic variation • Gene flow within and among populations is a strong cohesive force ...
Name: Date: Period: _____ Unit 2 Notes, Part 1 – Macroevolution
... 1. There are two types of evolution based on their scale of action. Microevolution refers to change in the genetic makeup of a population from generation to generation. It refers to adaptations that are confined to a single gene pool (within one species). Macroevolution refers to evolutionary change ...
... 1. There are two types of evolution based on their scale of action. Microevolution refers to change in the genetic makeup of a population from generation to generation. It refers to adaptations that are confined to a single gene pool (within one species). Macroevolution refers to evolutionary change ...
SPECIATION
... heterogametic sex, in that they have XY sex chromosomes, whereas females are homogametic, with XX chromosomes When in the F1 offspring of two different animal races one sex is absent, rare, or sterile, that sex is the heterozygous [heterogametic] sex. Ex. From genetics, more males are colour blind o ...
... heterogametic sex, in that they have XY sex chromosomes, whereas females are homogametic, with XX chromosomes When in the F1 offspring of two different animal races one sex is absent, rare, or sterile, that sex is the heterozygous [heterogametic] sex. Ex. From genetics, more males are colour blind o ...
Wide Hybridization in Plant Breeding
... In wheat, this stringency is imposed by the Ph1 locus. In its presence, there is no pairing of homoeologues. To induce pairing and recombination of homoeologues the Ph1 system has to be disabled. This can be accomplished by mutation (deletion) or substitution of chromosome 5B. In diploids, there are ...
... In wheat, this stringency is imposed by the Ph1 locus. In its presence, there is no pairing of homoeologues. To induce pairing and recombination of homoeologues the Ph1 system has to be disabled. This can be accomplished by mutation (deletion) or substitution of chromosome 5B. In diploids, there are ...
Answers to Mastering Concepts Questions
... - behavioral isolation: two populations have different mating behaviors; - mechanical isolation: the sexual organs of members of the two populations may not be complementary; - gametic isolation: sperm of one population may not be able to fertilize eggs of another because of biochemical differences. ...
... - behavioral isolation: two populations have different mating behaviors; - mechanical isolation: the sexual organs of members of the two populations may not be complementary; - gametic isolation: sperm of one population may not be able to fertilize eggs of another because of biochemical differences. ...
File
... Creates transgenic organisms: organism with altered genes Genetically Modified Organism – another name for transgenics ...
... Creates transgenic organisms: organism with altered genes Genetically Modified Organism – another name for transgenics ...
Unit 5 Answers - Iowa State University
... Hardy-Weinberg CANNOT have any of the previous occurring because evolution would be happening in the population. Hardy-Weinberg also requires random mating Explain the four patterns of natural selection. Directional Selection: favoring one side/direction of characteristics Stabilizing Selection: fav ...
... Hardy-Weinberg CANNOT have any of the previous occurring because evolution would be happening in the population. Hardy-Weinberg also requires random mating Explain the four patterns of natural selection. Directional Selection: favoring one side/direction of characteristics Stabilizing Selection: fav ...
PPT
... Gene Flow - Exchange of genes with another population – Occurs when individuals migrate between populations Mutation - A random change in an organism’s DNA __________________________________________ Fitness – The contribution that an individual makes to the gene pool of the next generation compared ...
... Gene Flow - Exchange of genes with another population – Occurs when individuals migrate between populations Mutation - A random change in an organism’s DNA __________________________________________ Fitness – The contribution that an individual makes to the gene pool of the next generation compared ...
Hybrid (biology)
In biology a hybrid, also known as cross breed, is the result of mixing, through sexual reproduction, two animals or plants of different breeds, varieties, species or genera. Using genetic terminology, it may be defined as follows. Hybrid generally refers to any offspring resulting from the breeding of two genetically distinct individuals, which usually will result in a high degree of heterozygosity, though hybrid and heterozygous are not, strictly speaking, synonymous. a genetic hybrid carries two different alleles of the same gene a structural hybrid results from the fusion of gametes that have differing structure in at least one chromosome, as a result of structural abnormalities a numerical hybrid results from the fusion of gametes having different haploid numbers of chromosomes a permanent hybrid is a situation where only the heterozygous genotype occurs, because all homozygous combinations are lethal.From a taxonomic perspective, hybrid refers to: Offspring resulting from the interbreeding between two animal species or plant species. See also hybrid speciation. Hybrids between different subspecies within a species (such as between the Bengal tiger and Siberian tiger) are known as intra-specific hybrids. Hybrids between different species within the same genus (such as between lions and tigers) are sometimes known as interspecific hybrids or crosses. Hybrids between different genera (such as between sheep and goats) are known as intergeneric hybrids. Extremely rare interfamilial hybrids have been known to occur (such as the guineafowl hybrids). No interordinal (between different orders) animal hybrids are known. The third type of hybrid consists of crosses between populations, breeds or cultivars within a single species. This meaning is often used in plant and animal breeding, where hybrids are commonly produced and selected, because they have desirable characteristics not found or inconsistently present in the parent individuals or populations.↑ ↑ ↑ ↑