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Genetics - Biology Junction
Genetics - Biology Junction

... 17. stronger of two alleles which shows up most often 20. The weaker of two alleles in a pair that is often masked by the dominant allele 21. Male part of a flower 22. Crossing a hybrid with a homozygous dominant or homozygous recessive organism resulting in a 1:1 ratio 24. How Mendel had to pollina ...
BioA414 Handout IX-2017
BioA414 Handout IX-2017

... • Until recently  marriage with someone from nearby • The last half of the 20th century was characterized by the breakups of local population isolates • This major change in breeding pattern  increased genetic heterogeneity ...
File
File

... segment of DNA that carries hereditary instructions and is passed from parent to offspring •Located ...
Standards: Gen 2.7 Use Punnett squares to explain Mendel`s three
Standards: Gen 2.7 Use Punnett squares to explain Mendel`s three

... offspring in monohybrid and dihybrid crosses of common genetic traits and disorders. Essential Questions: How did Gregor Mendel establish the basics of genetics? ...
Genetic Drift
Genetic Drift

... Gene flow – movement of genes between populations. Gain or loss of alleles from a population due to migration of fertile individuals, or from the transfer of gametes Random Mating Bottleneck Effect – population undergoes a drastic reduction in size as a result of chance events. A cause of genetic dr ...
Chapter 23 The Evolution of Populations
Chapter 23 The Evolution of Populations

... Inbreeding - mating between closely related partners Assortative mating - individuals select partners that are like themselves in certain phenotypic characters Natural Selection Genetic Variation Polymorphism - two or more contrasting forms are each represented in a population Geographical variation ...
DNA & RNA
DNA & RNA

... to genetic drift after a small population inhabits a new region • Bottleneck effect: a small surviving group (near extinction) gives rise to a new population with a dramatically different gene pool ...
Mechanisms of Evolution
Mechanisms of Evolution

... Genetic Drift: Evolution by chance • 1) Bottleneck Effect: Most of the population is destroyed by a natural event (volcano, earthquake, etc.) and a few individuals survive to reproduce • 2) Founder Effect: Few people leave an area to colonize new area ...
Beyond Dominant and Recessive alleles
Beyond Dominant and Recessive alleles

... Beyond Dominant and Recessive alleles ...
013368718X_CH11_159
013368718X_CH11_159

... 12. THINK VISUALLY The capital letter G represents the allele in peas that causes the dominant trait, gray seed coat. The lower-case letter g represents the recessive allele that causes the recessive trait, white seed coat. In the circles, show the alleles in the gametes of the parent generation. Sh ...
08_PopulationGenetics
08_PopulationGenetics

... 4. Dominant alleles in the population's gene pool will slowly increase in frequency while recessive alleles will decrease. 5. The population probably has an equal frequency of A and a alleles. The correct answer is b. The conditions described all contribute to genetic equilibrium, where it would be ...
Genetics and Heredity
Genetics and Heredity

... GENETICS AND HEREDITY? Genetics is …………… ...
Answers to Punnett Square Worksheet
Answers to Punnett Square Worksheet

... ...
Scientific Farm Animal Production: Chapter 14 Mating Systems Key
Scientific Farm Animal Production: Chapter 14 Mating Systems Key

... 5. What is a major advantage of inbreeding? Inbreeding increases Heterosis. It also identifies some desirable genes. Inbred animals with superior performance are most likely to have superior breeding values; resulting in more uniform progeny. ...
Name
Name

... 5. After graduation, you and 19 friends build a raft, sail to a deserted island, and start a new population, totally isolated from the world. Two of your friends carry (that is, are heterozygous for) the recessive cf allele, which in homozygotes causes cystic fibrosis. Assuming that the frequency o ...
mutation-selection balance.
mutation-selection balance.

Why Pea Plants? - New Century Academy
Why Pea Plants? - New Century Academy

... Three characters (Flower color, Seed color, and Pod shape) are considered in a cross between two pea plants (PpYyIi X ppYyii) What fraction of offspring would be predicted to be homozygous recessive for at least two of the three characters ...
Introduction to Genetics
Introduction to Genetics

... Homozygous- An organism that has two identical alleles for a particular trait. Heterozygous- An organism that has two different alleles for a particular trait. ...
the evolution of populations
the evolution of populations

... Is also an example of Stabilizing Selection ...
Heredity
Heredity

VOCAB- Evolution
VOCAB- Evolution

... ADAPTIVE RADIATION (DIVERGENT EVOLUTION) – process by which a single species or small group of species evolves into several different forms that live in different ways; rapid growth in the diversity of a group of organisms. COEVOLUTION- process by which two species evolve in response to changes in e ...
Genetics Jeopardy
Genetics Jeopardy

... The passing on of traits from parent to offspring ...
HND Sample – Animal Studies
HND Sample – Animal Studies

... At the other end of the spectrum, outbreeding can lead to problems as well as inbreeding. Outbreeding is the crossing of two closely related, although separate species. If two animals breed that are genetically very different, then the resulting offspring may be incapable of reproducing themselves. ...
Migration, drift, and non
Migration, drift, and non

... Nm = number of sexually reproductive males Nf = number of sexually reproducing females ...
Genetics Notes
Genetics Notes

... Ex: Purple-flowering plant only has purpleflowered offspring ...
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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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