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NAME_______________________________ EXAM
NAME_______________________________ EXAM

... 10 prezygotic barriers 17) most frequent in populations that have high heterozygosity 18) occurs when the average excesses for fitness of all alleles at a 18 selective equilibrium polymorphic locus equal zero but broad-sense heritability is nonzero 19) permit construction of haplotype trees for chro ...
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AP_SG_Chap15_mech_modified evolution

... What was the significance of Lamarck’s ideas? ...
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Hardy (Castle) Weinberg Equilibrium: Deviations from Hardy
Hardy (Castle) Weinberg Equilibrium: Deviations from Hardy

... loss of variation across the entire genome over time. This even can result in a loss of polymorphism (alternate alleles) and driving the frequency of one allele to 1. How is this relevant to evolution? The fluctuation of allele frequencies in a small isolated population might lead to novel genetic c ...
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Natural selection worksheet 1 - Summer Research Program for

... but due to the extreme temperatures, many mothers only have one cub left. ...
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The Relationship Between XRCC1 and XRCC6 Genes

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... Four conditions required for natural selection: 1. Variation- Individuals in a population are not _______________ to each other. 2. Inheritance- Traits are passed to _________________; traits have a genetic basis 3. Environmental population limits- Environmental ________________ ____________ prevent ...
Hall of Fame, Fall 2013, Part 1
Hall of Fame, Fall 2013, Part 1

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Sample Exam Questions

... D. Directional selection requires new mutations whereas stabilizing selection operates on existing variation E. Directional selection operates on existing variation, whereas stabilizing selection operates on existing variation. 6. Antagonistic co-evolution: A. Applies when kin-selection does not fa ...
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... • The autosomes include all the chromosome pairs except the sex chromosomes (the XY pair). • Some important inherited disorders of autosomal genes include cystic fibrosis, sickle cell anemia, and Tay Sachs disease ...
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... covered by the progeny of a single pair .... The Elephant is reckoned to be the slowest breeder of all known animals, and I have taken some pains to estimate its probable minimum rate of natural increase: it will be under the mark to assume that it breeds when thirty years old, and goes on breeding ...
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01 Microevolution Unique Gene Pools and

... covered by the progeny of a single pair .... The Elephant is reckoned to be the slowest breeder of all known animals, and I have taken some pains to estimate its probable minimum rate of natural increase: it will be under the mark to assume that it breeds when thirty years old, and goes on breeding ...
ppt
ppt

... understand intraspecific variation Note: If all individuals were phenotypically identical, there would be no opportunity for selection Note: If all individuals were genotypically identical, there would be no opportunity for evolution ...
3 - Goshen Community Schools
3 - Goshen Community Schools

... understand intraspecific variation Note: If all individuals were phenotypically identical, there would be no opportunity for selection Note: If all individuals were genotypically identical, there would be no opportunity for evolution ...
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SAT 2 week 4 Evolution/Classification File

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preread c5c18

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2.4.measuring evolution of populations

... 2. Genetic analysis of a large population of mink inhabiting an island in Michigan revealed an unusual number of loci where one allele was fixed. Which of the following is the most probable explanation for this genetic homogeneity? * A. The population exhibited nonrandom mating, producing homozygou ...
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File

Speciation - nicholls.edu
Speciation - nicholls.edu

... arise from single populations of a widespread species. ...
Allopatric speciation
Allopatric speciation

... arise from single populations of a widespread species. ...
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the Note

... The organisms best suited to the environment survive, reproduce and pass on their inherited adaptations to the next generation. In this way, the composition of the population changes, i.e. the population evolves. Because the best-suited individuals survive, the population remains suited to its envir ...
Mendel and The Gene Idea
Mendel and The Gene Idea

... • Example: M, N, MN blood groups. – Based on 2 specific molecules present on the surface of red blood cells. – Group M have one type of molecule ...
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Variation Within a Population

... Intrasexual selection is _______________ ___________________ among individuals of one sex (often males) for mates of the opposite sex Intersexual selection ...
Chapter 5: Heredity Section1- Genetics
Chapter 5: Heredity Section1- Genetics

... “A Blood” you need _____ and _____ _____ and _____ “B Blood” you need _____ and _____ _____ and _____ “AB Blood” you need _____ and _____ ...
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Polymorphism (biology)



Polymorphism in biology is said to occur when two or more clearly different phenotypes exist in the same population of a species—in other words, the occurrence of more than one form or morph. In order to be classified as such, morphs must occupy the same habitat at the same time and belong to a panmictic population (one with random mating).Polymorphism as described here involves morphs of the phenotype. The term is also used somewhat differently by molecular biologists to describe certain point mutations in the genotype, such as SNPs (see also RFLPs). This usage is not discussed in this article.Polymorphism is common in nature; it is related to biodiversity, genetic variation and adaptation; it usually functions to retain variety of form in a population living in a varied environment. The most common example is sexual dimorphism, which occurs in many organisms. Other examples are mimetic forms of butterflies (see mimicry), and human hemoglobin and blood types.According to the theory of evolution, polymorphism results from evolutionary processes, as does any aspect of a species. It is heritable and is modified by natural selection. In polyphenism, an individual's genetic make-up allows for different morphs, and the switch mechanism that determines which morph is shown is environmental. In genetic polymorphism, the genetic make-up determines the morph. Ants exhibit both types in a single population.Polymorphism also refers to the occurrence of structurally and functionally more than two different types of individuals, called zooids within the same organism. It is a characteristic feature of Cnidarians.For example, in Obelia there are feeding individuals, the gastrozooids; the individuals capable of asexual reproduction only, the gonozooids, blastostyles and free-living or sexually reproducing individuals, the medusae.
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