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Workshop on Microevolution
Workshop on Microevolution

... might change allele frequencies in that population. See above. 3. What might happen to the allele frequencies of a population in the event of a natural disaster that randomly wiped out a large proportion of the individuals? This would result in Bottleneck Effect, a form of genetic drift. A major shi ...
population genetics
population genetics

... some rare alleles may be at high frequency; others may be missing  skew the gene pool of new population ...
Ch - TeacherWeb
Ch - TeacherWeb

... located at the chromosome ends; associated with aging and cancer B. Nondisjunction: cell division during which sister chromatids fails to separate properly; occurs in any organism where gametes are produced through meiosis 1. nondisjunction in meiosis I or II results in gametes that have the incorre ...
Genetics Vocabulary
Genetics Vocabulary

... Definition: The genetic makeup of an organism. Often used to refer to a specific genetic allele which is responsible for specific observable trait (phenotype). A set of alleles which is responsible for a particular phenotype. Phenotype Definition: An observable, measurable characteristic of an organ ...
ch 11 notes
ch 11 notes

... Polygenic Traits: traits that result from the interaction of multiple gene pairs ...
SC.912.L.16.1 - G. Holmes Braddock High School
SC.912.L.16.1 - G. Holmes Braddock High School

File
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... A ______-cross involves two ________, such as seed color and seed shape. Mendel used dihybrid crosses in his second experiments and found that the _______ of one _________ did ____ affect the _________ of another character. In modern terms, the law of _________ ________holds that during _______ form ...
CHAPTER 26
CHAPTER 26

... negatively correlated with the survival of wild species. C10. Answer: When a correlation coefficient is statistically significant, it means that the association is likely to have occurred for reasons other than random sampling error. It may indicate cause and effect but not necessarily. For example, ...
Basic Genetics - Montville.net
Basic Genetics - Montville.net

... 787 tall plants, 277 short plants 3 to 1 ratio ...
Genetics PowerPoint
Genetics PowerPoint

... Mendel then cross-pollinated two P generation plants that had different forms of the trait (purple and white flower). The offspring from that were called the F1 generation. F 1 Generation = Filial generation (of son or daughter) ...
basic features of breeding
basic features of breeding

... with better yield and quality  Selection must be done as quick and simple as possible using a special characteristic which is correlated to yield or quality  When selection is used as a breeding procedures, one can select and accumulate only what is available in the current population  No matter ...
Take Home Quiz- Genetics 1. A partial Punnett square is shown
Take Home Quiz- Genetics 1. A partial Punnett square is shown

... C. D. 7. Garden pea plants can have yellow seeds or green seeds. In a pea plant that is heterozygous for seed color, the allele for yellow seeds masks the effects of the allele for green seeds. Which of the following terms best describes the allele for yellow seeds? A. codominant B. ...
16.1 Genes and Variation - Center Grove Elementary School
16.1 Genes and Variation - Center Grove Elementary School

Name____________________ Genetics Study Guide/Reality Check
Name____________________ Genetics Study Guide/Reality Check

... 29. What phenotype (dominant or recessive) do all heterozygous individuals show? Why? _Dominant because all heterozygous organisms have a copy of each allele; dominant and recessive. Since the organism has a copy of the dominant allele, the individual will show the dominant trait. 30. How is probabi ...
PRACTICE TEST CHAPTER 11 ______ 1. Different forms of a gene
PRACTICE TEST CHAPTER 11 ______ 1. Different forms of a gene

... Which phenotypic ratio did Mendel find in his F2 Generation from the parental cross TT x tt? a. ...
Chapter 23 - HCC Learning Web
Chapter 23 - HCC Learning Web

... • Duplication of small pieces of DNA increases genome size and is usually less harmful • Duplicated genes can take on new functions by further mutation • An ancestral odor-detecting gene has been duplicated many times: humans have 1,000 copies of the gene, mice have 1,300 ...
HARDY-WEINBERG EQUILIBRIUM At the time that Mendel`s work
HARDY-WEINBERG EQUILIBRIUM At the time that Mendel`s work

... Drift will be the primary factor affecting gene frequency when populations are small. If the reproductive population only contains a few individuals it is not surprising that chance is a major factor. For example if we closed our eyes and counted out 10 jelly beans from a bowl that contained an eve ...
Chapter 16: The Evolution of Populations and Speciation
Chapter 16: The Evolution of Populations and Speciation

... Small populations Disease Natural disasters ...
MENDEL & Variations of Mendel
MENDEL & Variations of Mendel

... homologous chromosomes do not separate properly during meiosis I or sister chromatids fail to separate during meiosis II Aneuploidy: chromosome number is abnormal ...
Chapter 9 - Personal
Chapter 9 - Personal

... – Geneticists measure genetic distance by recombination frequency ...
Chapter 10
Chapter 10

... VIII. Selection, inbreeding, and out-breeding are used to develop improved strains A. Inbreeding leads to organisms homozygous for many genes, some of which may be harmful In humans, marriage between close relatives is forbidden B. Out-breeding results more heterozygous allelic pairs, resulting in ...
Why Does the Cheetah Lack Genetic Diversity
Why Does the Cheetah Lack Genetic Diversity

... person, just like hair color. When you look at the proteins in the blood of cheetahs, they are very similar; it looks as if they are identical twins of one another, meaning they are closely related. The study of biological inheritance is called "genetic research." Genes, which are composed of DNA, s ...
Chapter 5.3 – Human Genetics (Part I)
Chapter 5.3 – Human Genetics (Part I)

... 2. Why does a polygenic trait have a wide range of phenotypes in the population? Polygenic traits have a wide range because of all the possible different allele combinations. 3. Show the results of a cross between an individual that is homozygous for A type blood and an individual that is heterozygo ...
Mendel`s Laws of Heredity Why we look the way we look
Mendel`s Laws of Heredity Why we look the way we look

BIO 103 Genetics Ch.12
BIO 103 Genetics Ch.12

... (3) Codominance: the heterozygote shows some aspect of the phenotypes of both homozygotes. ...
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Inbreeding

Inbreeding is the sexual reproduction of offspring from the mating or breeding of individuals or organisms that are closely related genetically. By analogy, the term is used in human reproduction, but more commonly refers to the genetic disorders and other consequences that may arise from incestuous sexual relationships and consanguinity.Inbreeding results in homozygosity, which can increase the chances of offspring being affected by recessive or deleterious traits. This generally leads to a decreased biological fitness of a population (called inbreeding depression), which is its ability to survive and reproduce. An individual who inherits such deleterious traits is referred to as inbred. The avoidance of such deleterious recessive alleles caused by inbreeding, via inbreeding avoidance mechanisms, is the main selective reason for outcrossing. Crossbreeding between populations also often has positive effects on fitness-related traits.Inbreeding is a technique used in selective breeding. In livestock breeding, breeders may use inbreeding when, for example, trying to establish a new and desirable trait in the stock, but will need to watch for undesirable characteristics in offspring, which can then be eliminated through further selective breeding or culling. Inbreeding is used to reveal deleterious recessive alleles, which can then be eliminated through assortative breeding or through culling. In plant breeding, inbred lines are used as stocks for the creation of hybrid lines to make use of the effects of heterosis. Inbreeding in plants also occurs naturally in the form of self-pollination.
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