she receives both recessive alleles. This is not always the case. For example‚ Huntington’s disease only requires one dominant gene for an individual to contract the disease. Suppose that a husband and wife‚ who both have a dominant Huntington’s disease allele (S) and a normal recessive allele (s)‚ decide to have a child. (a) List the possible genotypes of their offspring. (a) Sample space is {SS‚Ss‚sS‚ss} where S=dominant disease allele and s=normal recessive allele (b) What is the probability
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Allele Frequencies in Populations: Hardy-Weinberg Law Assumptions Already Made (Can’t Control) 1) Population Size 2) Mutation 3) Natural Selection 4) Immigration/emmigration 5) Non-random mate choice Can Control 1) Population Size 2) Natural Selection Control Variable Left side Experimental Variable Right Side Comparisons are most meaningful when there is only ONE difference between populations For this experiment only the population size should be different and everything else should
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is independent of the dominance of the corresponding allele. In other words‚ the phenotype that has the higher allele frequency will be more abundant in the population. e. Newlyweds Bill and Sue are non-freckled. Since each had one parent who had freckles‚ they wonder what the possibility is of their children having freckles. What would you tell them? i. The two newlyweds have the recessive phenotypes (ff); that is‚ there are no dominant alleles in their genotypic constitution. Consequently‚ the possibility
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Calculation of Allele and Genotype Frequencies & Hardy-Weinberg Equilibrium Theory INTRODUCTION Population geneticists study frequencies of genotypes and alleles within populations rather than the ratios of phenotypes that Mendelian geneticists use. By comparing these frequencies with those predicted by null models that assume no evolutionary mechanisms are acting within populations‚ they draw conclusions regarding the evolutionary forces in operation. In a constant environment‚ genes will continue
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The Allele Frequency Research on the Use of Right hand v.s Left hand at Southwest CTA Skylar Smith Jordan Stotts Kaley Felix Ana Charvet Southwest CTA Biology 9H p.6 February 13‚ 2014 __________________________________________________________________________ Abstract A gene can be defines as the basic physical unit of heredity; a linear sequence of nucleotides along a segment of DNA that provides the coded instructions for synthesis of RNA‚ which‚ when translated
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Kai Morson Matt Cring SCI 200: Changes in the World Friday 19th October 2012 The investigation of ABO allele population within Country of St. Thomas Introduction Everyone always worry about what his or her blood type may be or which blood type is more predominant and what race that creates such high frequencies. The objective associated with this lab will compare these allele frequencies from different sample groups such as St. Thomas Black to that of USA‚ St. Thomas Black to that of the
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connected by three hydrogen bonds. In DNA‚ two DNA strands coil together to create a double-helix‚ this is where base pairing occurs between the two strands when hydrogenous bonds are created between two bases. Genes also have variants‚ which are called alleles‚ which play a large part in the inheritance of genes via
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each pair of homologous chromosomes. The alleles may be identical or different. (2)____Homozygous__________- when both alleles in a homologous chromosome pair have the same expression. Example: both alleles code for straight hairline at forehead. (3)______Heterozygous__________- when the alleles differ in their expression. Example: one allele codes for straight hairline and the other for widow’s peak. (4)______Dominant_________- in a heterozygous pair of alleles‚ it is the one that exerts its effects
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intellectual property. It does not contain the ideas‚ or writing of other individuals/authors. Author ___________________________ Date ___________________ Lab Instructor ____________________ Lab Section # ____________ The Change in Allele Frequency of the Male Cichlid Fish Population General Research Question: Lake Malawi’s cichlid male population of fish are tested on their ability to build bowers to attract the female population. Altering this extended phenotype‚ or ability
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Dihybrid Cross Worksheet 1. Set up a punnett square using the following information: • • • • • Dominate allele for tall plants = D Recessive allele for dwarf plants = d Dominate allele for purple flowers = W Recessive allele for white flowers = w Cross a homozygous dominate parent (DDWW) with a homozygous recessive parent (ddww) 2. Using the punnett square in question #1: a. What is the probability of producing tall plants with purple flowers? Possible genotype(s)? b. What is the probability of
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