Chapter 16
... Explain how migration can affect the genetics of populations. Explain how genetic drift can affect populations of different sizes. Contrast the effects of stabilizing selection, directional selection, and disruptive selection on populations over time. Identify examples of nonrandom mating. ...
... Explain how migration can affect the genetics of populations. Explain how genetic drift can affect populations of different sizes. Contrast the effects of stabilizing selection, directional selection, and disruptive selection on populations over time. Identify examples of nonrandom mating. ...
440speciation2a
... generations of crossing within the hybrid population, followed by two generations of backcrossing to H. annuus. Therefore, in the absence of selection, one expects 1/8 of the genes to derive from H. petiolaris, with a distribution concentrated in the 1– 25% class. In regions of genome with the same ...
... generations of crossing within the hybrid population, followed by two generations of backcrossing to H. annuus. Therefore, in the absence of selection, one expects 1/8 of the genes to derive from H. petiolaris, with a distribution concentrated in the 1– 25% class. In regions of genome with the same ...
Lecture 13: Speciation Continued
... phenotypes matched to resource dist’n: • NO select’n for assortative mating (e.g. seed & beak sizes) • No speciation b/c equal fitness ...
... phenotypes matched to resource dist’n: • NO select’n for assortative mating (e.g. seed & beak sizes) • No speciation b/c equal fitness ...
Individual-based neural-network genetic
... practical limit to how many individuals that can be simulated • In models where the number or biomass of individuals are important and very high, a way around this problem is to treat each individual as a super-individual • A super-individual simply has a number added to its attribute vector telling ...
... practical limit to how many individuals that can be simulated • In models where the number or biomass of individuals are important and very high, a way around this problem is to treat each individual as a super-individual • A super-individual simply has a number added to its attribute vector telling ...
Post-zygotic reproductive isolation in two populations of the African
... trials produced young, indicating that more than 98% of hybrids were sterile. However, it is possible that some hybrids would not have inherited the tandem fusion and could have produced young. Also, it may be assumed that hybrids with the tandem fusion could have produced some viable gametes, and w ...
... trials produced young, indicating that more than 98% of hybrids were sterile. However, it is possible that some hybrids would not have inherited the tandem fusion and could have produced young. Also, it may be assumed that hybrids with the tandem fusion could have produced some viable gametes, and w ...
Speciation and Extinction
... 1C.1a: Speciation rates can vary, especially when adaptive radiation occurs when new habitats become available. 1C.1b: Species extinction rates are rapid at times of ecological stress. Illustrative example: Five major extinctions 1C.2a: Speciation results in diversity of life forms. Species can be p ...
... 1C.1a: Speciation rates can vary, especially when adaptive radiation occurs when new habitats become available. 1C.1b: Species extinction rates are rapid at times of ecological stress. Illustrative example: Five major extinctions 1C.2a: Speciation results in diversity of life forms. Species can be p ...
Mating Systems 1 Mating According to Index Values
... Mating of highly related individuals increases the homozygosity of alleles at gene loci. Inbreeding Depression is a decrease in performance of traits (generally with low heritability) which are thought to be influenced by non-additive genetic effects (i.e. dominance effects). Inbreeding is a way to ...
... Mating of highly related individuals increases the homozygosity of alleles at gene loci. Inbreeding Depression is a decrease in performance of traits (generally with low heritability) which are thought to be influenced by non-additive genetic effects (i.e. dominance effects). Inbreeding is a way to ...
Topic Review Guide – Speciation
... 7. Explain why polyploidy is much more common in plant species than in animal species. How can polyploidy lead to reproductive isolation? 8. Recall that sexual selection is the process by which females of a species seeking a mate select the males of their species based on an attractive appearance or ...
... 7. Explain why polyploidy is much more common in plant species than in animal species. How can polyploidy lead to reproductive isolation? 8. Recall that sexual selection is the process by which females of a species seeking a mate select the males of their species based on an attractive appearance or ...
The Evolutionary Significance of Chance: Mating Systems
... - the census number (N), adjusted for skewed sex ratio, perenniality, selfing, persistent seed bank, ploidy, non-random variation in fecundity etc. - most cases, Ne is less than the actual count of individuals in the population (N) ...
... - the census number (N), adjusted for skewed sex ratio, perenniality, selfing, persistent seed bank, ploidy, non-random variation in fecundity etc. - most cases, Ne is less than the actual count of individuals in the population (N) ...
Gorillas: an example of an issue report
... surviving in the wild. The genetic diversity created gives rise to new genotypes and these may create new phenotypes in the population. These new phenotypes may allow the species to be better able to adapt to small changes in their habitat. There are differences between lowland and mountain gorillas ...
... surviving in the wild. The genetic diversity created gives rise to new genotypes and these may create new phenotypes in the population. These new phenotypes may allow the species to be better able to adapt to small changes in their habitat. There are differences between lowland and mountain gorillas ...
Molecular markers and their applications in cereals breeding
... humid areas of the word. In Central Europe, severe natural epidemics of Fusarium head blight (FHB) occur once or twice in a decade and can sharply reduce yield and quality of susceptible genotypes. Deoxynivalenol (DON) are harmful to humans, because they are highly heat stable and cannot be eliminat ...
... humid areas of the word. In Central Europe, severe natural epidemics of Fusarium head blight (FHB) occur once or twice in a decade and can sharply reduce yield and quality of susceptible genotypes. Deoxynivalenol (DON) are harmful to humans, because they are highly heat stable and cannot be eliminat ...
Breeding Strategies for the Management of Genetic Disorders
... must combine to cross a threshold and produce an affected dog. These are known as liability genes. In identifying a dog’s liability for carrying defective genes for a polygenic disorder, the breadth of the pedigree (that is, consideration of all siblings of individuals in the pedigree) is more impor ...
... must combine to cross a threshold and produce an affected dog. These are known as liability genes. In identifying a dog’s liability for carrying defective genes for a polygenic disorder, the breadth of the pedigree (that is, consideration of all siblings of individuals in the pedigree) is more impor ...
Speciation
... in 111 Hutterite couples • Matching at entire 16-locus haplotype and/or allele sharing at HLA-B-linked locus confers significant risk for fetal loss ...
... in 111 Hutterite couples • Matching at entire 16-locus haplotype and/or allele sharing at HLA-B-linked locus confers significant risk for fetal loss ...
Ch 13 Population Genetics
... Carolus Linnaeus - 1760’s, introduced method of classifying living organisms - assumed fixed and unchanging species biologists of late 1700’s - concept of changing species Jean Baptiste Lamarck - 1800, first scientific hypothesis of evolution - based on inheritance of acquired characteristics Charle ...
... Carolus Linnaeus - 1760’s, introduced method of classifying living organisms - assumed fixed and unchanging species biologists of late 1700’s - concept of changing species Jean Baptiste Lamarck - 1800, first scientific hypothesis of evolution - based on inheritance of acquired characteristics Charle ...
genes in population
... Carolus Linnaeus - 1760’s, introduced method of classifying living organisms - assumed fixed and unchanging species biologists of late 1700’s - concept of changing species Jean Baptiste Lamarck - 1800, first scientific hypothesis of evolution - based on inheritance of acquired characteristics Charle ...
... Carolus Linnaeus - 1760’s, introduced method of classifying living organisms - assumed fixed and unchanging species biologists of late 1700’s - concept of changing species Jean Baptiste Lamarck - 1800, first scientific hypothesis of evolution - based on inheritance of acquired characteristics Charle ...
The basics of kin selection theory Kin selection theory has
... likely suffer a cost because calling makes them conspicuous and presumably more likely to be attacked by the predator. Two lines of evidence suggest that individuals are more likely to give alarm calls when surrounded by a higher proportion of relatives. First, there is sex-biased dispersal and fema ...
... likely suffer a cost because calling makes them conspicuous and presumably more likely to be attacked by the predator. Two lines of evidence suggest that individuals are more likely to give alarm calls when surrounded by a higher proportion of relatives. First, there is sex-biased dispersal and fema ...
Corporate Profile
... Viability - the probability of survival through each reproductive stage – Darwin’s natural selection ...
... Viability - the probability of survival through each reproductive stage – Darwin’s natural selection ...
File
... Natural selection that favors altruistic behavior by enhancing reproductive success of relatives ...
... Natural selection that favors altruistic behavior by enhancing reproductive success of relatives ...
Speciation - OpenStax CNX
... One form of sympatric speciation can begin with a chromosomal error during meiosis or the formation of a hybrid individual with too many chromosomes. Polyploidy is a condition in which a cell, or organism, has an extra set, or sets, of chromosomes. Scientists have identi ed two main types of polyplo ...
... One form of sympatric speciation can begin with a chromosomal error during meiosis or the formation of a hybrid individual with too many chromosomes. Polyploidy is a condition in which a cell, or organism, has an extra set, or sets, of chromosomes. Scientists have identi ed two main types of polyplo ...
most - Salamander Genome Project
... Ratios of effective population sizes are lower than were assumed in 1988. Impacts of interactions between genetic and other stochastic factors may have been underestimated. Impacts of inbreeding depression were likely underestimated. Overestimated effectiveness of natural ...
... Ratios of effective population sizes are lower than were assumed in 1988. Impacts of interactions between genetic and other stochastic factors may have been underestimated. Impacts of inbreeding depression were likely underestimated. Overestimated effectiveness of natural ...
Genetic Transfer PPT
... the accuracy of the EPDs, and who estimated the EPDs. A high EPD is not necessarily good; it depends on the trait being considered and breeding objectives. ...
... the accuracy of the EPDs, and who estimated the EPDs. A high EPD is not necessarily good; it depends on the trait being considered and breeding objectives. ...
Problems of Kinship
... are equally likely to alarm call Why should an individual warn others when doing so makes it MORE vulnerable to predation? The behavior does not increase the fitness of the actor. How could it be maintained in the population? Males disperse at sexual maturity (about 2 years of age), but females rema ...
... are equally likely to alarm call Why should an individual warn others when doing so makes it MORE vulnerable to predation? The behavior does not increase the fitness of the actor. How could it be maintained in the population? Males disperse at sexual maturity (about 2 years of age), but females rema ...