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CGAP - Mexico
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AP CG&P Mexico
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Breeding and Selection Breeding: the mating and production of offspring by animals. The activity of controlling the mating and production of offspring of animals Selection: the act of choosing something or someone from a group Geneus species of livestock European cattle- Bos taurus Zebu Cattle- Bos Indicus Swine- Sus Scrofa Sheep- Ovis Aries Horse- Equus Cabellus Goat- Capra Hircus Dog- Canis Familaris Cat- felis catus Principles of Breeding and Genetics Phenotype: the characteristic of an animal that can be seen or measured Genotype: the genetic makeup of an individual (DNA) Phenotype= Genotype + Environment Genotype= phenotype - Envoromet Selection: differently producing what one wants in a herd. Allowing only certain mating to occur. Inheritance: transmission of genes from parents to offsprings Basic Cell Information Chromosomes: in the nucleus and contains genetic material Gene: an active area in the chromosome that codes for trait DNA: complex molecule of the chromosomes which is the coding mechanism of inheritance Gametogenesis: Process that the gonads produce cells that become gametes(ova and sperm) Spermatogenesis: production of sperm Oogenesis: production of egg or ova Meiosis- special type of nuclear division in which germ cells contain one member of each chromosomes pair Fertilization: when an egg and sperm unite from embryo Each contributes one chromosome per pair to new life Homosygous: an individual whose genes for a particular trait are identical or alike Heterozygous: individual who possesses unlike genes for particular trait Dominant: a gene that overpowers and prevents the expression of its recessive allele when the two alleles are present in a heterozygous individual Recessive: a gene that its expression is masked by dominant allele Allele: gene occupying corresponding loci on homologus chromosomes that affect the same trait What traits should one select? Only traits that contribute to productive efficiency and consumer acceptance are of economic importance Ex: reproduction, growth(pre-weaning, post weaning) Basis of Selection Appearance Genetic abnormalities Estimate carcas merit Fit standard for herd Reproduction record Individuals records Progeny testing Pedigree family Factors affecting genetic progress Selection differential Heritability Genetic interval Accuracy of records Genetic correlation Number of traits in selection program Things to remember about traits Heritability: amount of the phenotypic expression of a trait that is transmitted to offspring (enviroments have big effect) (h2) Heterosis: the tendency of a crossbred individual to show qualities superior to those of both parents Generation interval The average age of the parents when offsprings are born The shorter the generation interval, the faster the genetic interval Selection Methods Tandem Selection: Selection for one trait at a time Least effective: mattes rapid gain in a single trait, but is slow to reach selection goal involving several traits Independant culling: establishes minimum culling levels for each trait makes SLOWER gain for each trait, but reaches goals faster. Most effective when few traits are involved. Selection Index: each animal is rated numerically by combining performance of several traits into a single index New Mexico Ram Test Selection Index Index=12 + 40 (ADG) + 30(CWF) + SL - 12 (DIA) - o.5 (VAR) All variables expressed as ratio of individual to the average ADG= average daily grain CWF= clean wool fibers SL= staple length DIA= Fiber diameter VAR= difference between dide and Britch Breeding Systems Purebred breeder: develop breeding stock that pocessess the highest predictability for transmitting the most desirable inheritance possible purebred animal: meets the requiramnets of a recognized breed and whose ancestors are registered in the herd book of that breed Breed: race or variety of livestock where the members are related by descent and are similar Purebred breeders may use: Linecrossing: crossing different lines or unrelated animals of the same breed, it is also used as outcrossing for outbreeding systems. It results in an increased heterozygosity and heterosis (offspring will not breed true). Heterosis: increase in production in the offspring over average of parents. Inbreeding: mating of related individuals( sires and dams share at least one ancestor) results in a increase of homozygosisty Inbreeding coefficient: measures of how inbred an animal is( the probability two genes of a pair in an individual will be homozygous because they are replicates of a single ancestor gene Coefficient ranges from 0-1. 0=no change, 1=absolute certenity Increase inbreeding usually detrimental to: reproductive performance, pre-weaning growth, post-weaning growth, increase susceptibility to environmental stress Commercial Producers: make use of available genetic material in a manner to maximize production or give most efficient, rapid and economical prodyction possible Systems used by commercial producers Species crossing- how many result in nonfertile offsprings Crossbreeding- mating animals of different established breeds and takes advantage of complementary and heterosis(hybrid vigor) oucrossing/ linerarcrossing- mating of unrelated animals of same breed Grading up- making purebred sires to commercial grade females and their female offspring for several generations Most common species crosses Jack to mare= mule Stallion to jennet= hinny Zebu to european cattle= brangus cattle American bison to cattle= buffalo Cross breeding system- designed to maximize hybrid vigor(heterosis) and produce replacement females throught the rotation of different sire breeds Terminal Static crossbreding system Produces replacement females throught the rotation while taking advantage of producing crossbred offspring Also know as “terminal crossbreeding system” Replacament females can be purchased from or produced in separate population Composiste breeding system Combines desirable traits of two or more breeds of cattle into one package Composition must be carefully planed in order to achieve genetic merit Utilizes hybrid vigor without crossbreeding Systems of mating Determied by: type of facilities, breeding schedule, method of heat detection, genetic program, market target hand/Stud mating Purebred breeders use to control breeding Females are kept apart from the males until desire time of breeding, Horse, Rabbit and Poultry advantages prevents overse of particule sire certainity of mating and to which Sire can increase conception rate by 5-10%. Disadvantages increases labor estrus detection becomes a seven-day a week job Pen mating Males and females coexist throught the breeding seasons or year rounds Used mostly by commercial breeders advantages Minimum labor Heat detection is the responsibility of the sire disadvantages Uncertainty of mating and date of conception Uncertainty of infertile sires and of un-bred females May overwork sires Artificial Insemination referred as AI Process by which semen from male is placed into the reproduction tract of the female using mechanical means rather than by natural source advantages Decrease spreed fo disease Increase number of offspring from superior male Identifies the fertility of sire Reduces number of sires needed Allows mating of small females to larger males Genetic diversity disadvantages Requires trained level of management Increases time and supervision of the female herd for estrus detection Sire training Semen handling and special breeding facilities More costly Embryo transfer Removal of early pregnancy embryos from a genetically superior female and placement of these embryos into reproduction tract of a suitable recipient for gestation and parturition Reproduction defined: process by which animals produce offsrpings for the purpose of continuing the species. The process of reproduction begins with copulation, which is the mating of a male and female of the species Sperm cells from the male are deposited in the female reproduction tract and try to unite with an egg cell When fertilization( a sperm cell and an egg cell units) occurs, an embryo begins The embryo attaches to the wall of the uterus where it is protected, recieves nourishment, and develops When the new offspring reaches the end of the gestation period, it is delivered from the female reproductive tract in a process called parturition
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AP CGov- Mexico Unit 5
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unit 3 Mexico
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mexico vocab
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Mexico Vocab
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Mexico
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Mexico Vocab
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AP U.S. History - Unit 7, Topic 2: American Imperialism (1898-1945) Definition of Imperialism Expansion of a country’s political, economic, and military influence over another. U.S. begins imperial expansion with the purchase of Alaska (1867) for $7.2 million (known as "Seward’s Folly"). Discovery of gold in 1898 increases interest in expansion. Westward expansion mindset extends beyond the continent after the closing of the frontier. Arguments for Imperialism Economic Interests Desire for raw materials (e.g., gold in Alaska). Need for new markets to sell American goods (manufactured & agricultural). Social Darwinism Belief that stronger nations naturally dominate weaker ones. Expansion seen as a way for the U.S. to become a world power. Racial & Religious Justifications Josiah Strong's book Our Country (1885): Argues Anglo-Saxon race is superior and must “civilize” others. Expansion is a Christian duty to spread Western civilization. Military & Strategic Reasons Alfred Thayer Mahan’s The Influence of Sea Power Upon History (1890): Nations with strong navies dominate world affairs. U.S. builds a steel navy and seeks territories for naval bases. Leads to the race for Pacific and Caribbean islands (e.g., Hawaii, Guam, Philippines). Arguments Against Imperialism Self-Determination Nations should have the right to govern themselves. Same argument used by Americans to justify independence from Britain. Tradition of Isolationism George Washington’s Farewell Address warned against foreign entanglements. Expansion could lead to unwanted wars and conflicts. Racial Concerns Debate over whether the Constitution follows the flag: If the U.S. takes over a territory, do its people become American citizens? Many anti-imperialists opposed granting rights to non-white populations. Key Takeaways Imperialists supported expansion for economic, military, and ideological reasons. Anti-imperialists opposed it on the grounds of self-determination, isolationism, and racial concerns. The debate shaped U.S. foreign policy and led to further territorial acquisitions, setting the stage for U.S. involvement in global affairs. End of Notes. The Spanish-American War & American Imperialism Background: The American Empire Late 19th-century industrialists and politicians sought U.S. expansion. Cuba, a Spanish colony, was a key target for expansion. 1895: Cuban nationalists rebelled against Spain, but Spain crushed the revolt. Yellow Journalism & the Path to War Yellow Journalism: Sensationalized news stories exaggerated Spanish atrocities in Cuba. Key figures: Joseph Pulitzer & William Randolph Hearst Encouraged U.S. intervention on humanitarian grounds. 1898: The U.S.S. Maine exploded in Havana Harbor, killing 200+ Americans. Yellow journalists blamed Spain, fueling war fever. Later investigations found the explosion was accidental. President McKinley issued an ultimatum to Spain; Spain agreed but the U.S. declared war anyway. The Spanish-American War (1898) Short war: America won and emerged as an imperial power. Effects of the war: Cuba gained independence, but the Platt Amendment gave the U.S. the right to intervene militarily. Philippines annexed after U.S. forces, led by Theodore Roosevelt, defeated Spain. Filipinos, expecting independence, rebelled under Emilio Aguinaldo → Led to the Philippine-American War (1899-1902). Hawaii annexed (1898) for strategic reasons (midpoint to the Philippines). The Open Door Policy (1899) China was divided into European spheres of influence. U.S. Secretary of State John Hay sent the Open Door Note to European powers, requesting equal trade access in China. Outcome: European powers did not reject the request, so the U.S. claimed success in securing trade rights. Significance The Spanish-American War marked the U.S.’s entry into imperialism. The U.S. expanded its influence globally through military power and economic policies. Let me know if you want any modifications! The Progressive Era (1890s-1920s) Main Idea: The Progressive Era was a time of social, political, and economic reform in response to issues caused by industrialization, urbanization, and corruption. Progressives believed government intervention was necessary to fix these problems. Who Were the Progressives? A diverse group: Protestants, feminists, labor leaders, African Americans, journalists Focused on issues like: Big business power (monopolies) Economic instability (Panic of 1893) Labor conflicts (strikes) Political corruption (machines like Tammany Hall) Jim Crow segregation Women’s suffrage Alcohol prohibition Muckrakers (Investigative Journalists) Exposed corruption and poor conditions in society Upton Sinclair - The Jungle (unsanitary meatpacking industry) Ida Tarbell - Exposed Standard Oil’s unfair business practices Jacob Riis - How the Other Half Lives (urban poverty and tenement conditions) Political Reforms (Expanding Democracy) Secret Ballot – Ended political bosses controlling votes. Direct Election of Senators (17th Amendment, 1913) – Senators now elected by the people instead of state legislatures. 18th Amendment (Prohibition, 1919) – Banned alcohol (led by groups like the Anti-Saloon League). 19th Amendment (Women’s Suffrage, 1920) – Gave women the right to vote. Initiative, Referendum, Recall – Gave citizens more power to propose, approve, and remove laws/politicians. Government Efficiency & Scientific Management Frederick Taylor’s "Scientific Management" (Taylorism) – Applied efficiency techniques to government & industry. Black Progressives & Civil Rights Plessy v. Ferguson (1896) – Legalized segregation (“separate but equal”). Niagara Movement (W.E.B. DuBois) – Advocated for immediate black rights. NAACP (1909) – Fought for racial justice through legal action. World War I (Unit 7, Topic 5) Causes of U.S. Involvement in WWI War Begins (1914): After Archduke Franz Ferdinand was assassinated, two alliances formed: Allied Powers: Britain, France, Russia (formerly Triple Entente) Central Powers: Germany, Austria-Hungary, Italy (formerly Triple Alliance) U.S. Neutrality: Initially stayed out of the war but faced mounting pressure due to events: Sinking of the Lusitania (1915): A German U-boat sank a British passenger ship, killing 128 Americans. Public outrage followed, but neutrality was maintained. Unrestricted Submarine Warfare: Germany resumed sinking ships, including American vessels. Zimmermann Telegram (1917): Germany proposed a military alliance with Mexico, promising to help regain lost territory if the U.S. joined the war. The U.S. intercepted the message, pushing Wilson to act. U.S. Declares War (1917) April 2, 1917: Woodrow Wilson asked Congress to declare war to “make the world safe for democracy.” American Expeditionary Forces (AEF): Led by General John J. Pershing, U.S. troops bolstered Allied forces and played a crucial role in turning the tide of the war. End of the War & Treaty of Versailles (1918-1919) November 11, 1918: Armistice signed, ending fighting. Treaty of Versailles (1919): Wilson proposed the Fourteen Points, advocating for self-determination, freedom of the seas, and the League of Nations. Britain and France sought to punish Germany, leading to harsh reparations and restrictions. League of Nations created, but the U.S. did not join due to congressional fears of being dragged into future wars. World War I: The Homefront (Unit 7, Topic 6) Total War & Mobilization The U.S. fully mobilized its economy, industry, and society for war. War Industries Board: Managed labor & factories to produce war supplies. Food Administration: Regulated food production for soldiers and civilians. Rural-to-urban migration increased as people sought industrial jobs. Civil Liberties & Government Control Espionage Act (1917) & Sedition Act (1918): Criminalized anti-war speech & draft resistance. Schenck v. United States (1919): Supreme Court ruled speech creating a "clear and present danger" (e.g., resisting the draft) could be restricted. Government censored reports on the Spanish Flu to maintain war morale. The First Red Scare (1919-1920) Fear of communist infiltration after the Russian Revolution. Palmer Raids: Over 6,000 suspected radicals, labor leaders, and immigrants arrested; 500+ deported. Immigration Restrictions Emergency Quota Act (1921) & National Origins Act (1924): Limited immigration, especially from Southern/Eastern Europe & Asia. Rooted in nativism (opposition to immigrants, especially Catholics & Jews). The Great Migration Large numbers of Black Americans moved from the South to Northern cities (e.g., Chicago, New York) for job opportunities & to escape Jim Crow laws. Faced discrimination & race riots in the North (e.g., 1919 race riots, Tulsa Race Massacre (1921)—300 Black people killed, 10,000 homeless)
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