AP Biology Mid-Term Study Guide 2015 Monitha Patel Chemical Bonding Compounds Sharing of a pair of valence electrons by two or more different atoms Molecule Two or more atoms held together by covalent bonds Ionic Electron attraction between two atoms Cations (+1) and Anions (-1) attract Covalent Sharing of valance electrons between atoms Nonpolar Electrons are shared equally O2 Polar Covalent Unequal sharing of electrons between atoms Two hydrogen atoms are bonded to a single oxygen
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SCI206 Unit 3 Individual Project American Intercontinental University SCI206-1001A-13 Abstract This assignment discusses the relationships between reproduction‚ heredity and DNA. Genetics – From Genes to Proteins‚ Mutations During transcription‚ the information in the DNA of a specific gene is copied into mRNA (messenger RNA)‚ which creates a nucleotide sequence. After transcription‚ if the DNA base sequence is 3’-TACCCTTTAGTAGCCACT-5’‚ then the base sequence of mRNA would be 5 ’-AUGGGAAAUCAUCGGUGA-3’
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|cross over | |dominant |frequency of recombination | |recessive |map unit | |allele |marker | |homozygote/homozygous |mapping function | |heterozygote/heterozygous
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Evolution‚ Genes & the Environment Variation is when you refer to genes; it means that there is a large variety of phenotypes‚ alleles and genotypes which can sometimes cause genetic variation. This results in different physical characteristics. Some examples of variations in humans are eye colour‚ hair colour and gender. Variations caused by the environment are the climate (tanned/pale skin) this is affected by the environment as the sun comes in contact with your skin and will darken it‚ the
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Biology‚ 7e (Campbell) Chapter 15: The Chromosomal Basis of Inheritance Chapter Questions 1) Chromosomes and genes share all of the following characteristics except that A) they are both present in pairs in all diploid cells. B) they both undergo segregation during meiosis. C) their copy numbers in the cell decrease after meiosis‚ and increase during fertilization. D) they are both copied during the S phase of the cell cycle. E) they both pair up with their homologues during
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Evidence of evolution suggests life may change. Outline the impact on the evolution of plants and animals of: Changes in physical conditions in the environment - Some animals do not survive changes in the environment and become extinct or endangered. Changes in physical conditions such as climate ad exposure to fire has led to changes in flora (Australia drifts north) Changed in chemical conditions in the environment - pH of environment can be critical to functioning of enzymes and metabolism
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| c | C | C | Cc | CC | c | cc | Cc | C= normal allele‚ dominant c= allele for cystic fibrosis Genetics: 1 out of 4 children will be double recessive (homozygous)25% 2 out of 4 children will have cystic fibrosis trait (heterozygous)50% 1 out of 4 children will be homozygous dominant 25% There is 75% chance that their children will have the allele for cystic fibrosis. There is a 25% chance their children won’t have the allele for cystic fibrosis. Cystic fibrosis is
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As the common question has been asked before‚ where did the blue budgie color morphing first take place? The first appearance of the blue budgie color morphing first took place in 1878 in Brussels [1]‚ then later reappeared dominantly in the Netherlands in the early 1880’s. Although the first color mutation was in the early 1880s‚ reproduction of the blue budgie gene was very unpredictable as scientists have documented. The first results in breeding the new blue budgies resulted in short life spans
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Quiz #1 (Pay attention to the answer key) Question 1 In the scientific method‚ the condition which is deliberately changed is referred to as the D. experimental variable. Question 2 Which of the following is not a step in the scientific method? D. Scientific Law Question 3 When an organism’s DNA is permanently altered‚ we say that it E. mutates. Question 4 Which answer choice is not a defining characteristic of life? C. disorder
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Twin studies reveal the absolute and relative importance of environmental and genetic influences on individual’s in a sample. Twin research is considered a key tool in behavioral genetics and in content fields‚ from biology to psychology. Twin studies are one part of a broader field – behavior genetics which includes all data that are genetically informative – siblings‚ adoptees. pedigree data etc. Twins are a valuable source for observation because they allow study of varying family environments
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