9.7 Option – Genetics: The Code Broken? Contextual Outline Science has come a long way since Mendel’s important work on identifying the transmission of inherited factors across generations. The code for transmitting this genetic information has been identified and models have been developed to explain gene functioning. Transcription of the information into functional proteins is now well understood and models are being developed to test how genes direct the structure‚ function and development
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Blueprint of Life: Gregor Mendel’s Experiments and the Inheritance of Characteristics How and When Mendel carried out his experiments: a. Briefly outline Mendel’s biography • Gregor Mendel (1822-1884) was an Augustinian monk of Austrian origin and is known as the Father of Genetics. • During his childhood he worked as a gardener‚ and as a young man attended the Olmutz Philosophical Institute. • In 1843 he entered an Augustinian monastery in Brunn‚ Czechoslovakia.
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Chi-square statistical test‚ which compares observed and predicted results‚ and to ultimately determine the genotype and phenotype of the parents. In this experiment‚ given the nature of a dihybrid cross‚ the following hypothesis was formulated. According to Mendel’s Laws of Inheritance‚ the F2 generation of a dihybrid cross involving two traits of a homozygous recessive mutant and a homozygous wild-type is expected to yield a phenotypic ratio of 9:3:3:1. To evaluate whether the experiment follows the
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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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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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MENDEL`S PRINCIPLES OF GENETICS 1.0 INTRODUCTION: 1.1 BACKGROUND Gregor Mendel‚ who is now considered as founder of classical genetics‚ ( Elrod S. & Stansfield w‚2010)‚ conducted a series of experiments using garden pea plants‚ his aim was to find a way of explaining to his fellow scientists who believed the blending theory which had been proposed earlier by Wiseman‚ that heredity involved the interaction of discrete separable factors (now known as genes) After a statistical analysis of the
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compare them to those that Gregor Mendel found in his work. PROBLEM What is the probability that certain genotypes and phenotypes will occur? MATERIALS 2 pennies 4 cm masking tape marker one folded‚ 3" × 5" index card with a monohybrid cross on it (e.g.‚ Aa × aa‚ or AA × Aa) PROCESS SKILLS Calculating Probabilities PROCEDURE 1. Using the coins‚ tape‚ and marker‚ label a set of two coins to simulate the cross listed on your group’s index card. Use a capital letter
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First‚ students started off planting F1 hybrid seeds of the Brassica Rapa. Students were given six cell tray and putted half of the soil on each cell. Then‚ students used forceps to plant two brassica rapa seeds‚ 0.5 inches deep‚ in the soil and buried one fertilizer pellets next to the seeds for each cell. The fertilizer will help the brassica rapa to grow. Once that was done‚ students added 2-3 drops of water on the plants. After students did that‚ students label their six cell with their name
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F2 generation - First and second filial generation. First Filial Generation - offspring from the cross of the P generation. Second Filial Generation - offspring of the first filial generation. Hybrid - an organism is heterozygous for a trait. Monohybrid - a cross of two heterozygous individuals that differ in one trait. (Aa * Aa) Product Rule - the probability or chance that two or more independent events will occur together is the product of their individual probabilities of occurring alone.
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(Assume no linkage) A. 65 B. 190 C. 250 D. 565 E. 750 3) Homologous chrmosomes contain identical a. genes b. alleles c. DNA sequences d. all of these are correct 4) What is the genotypic and phenotypic ratio from the F2 of a monohybrid cross? 5) If alleles R and s are linked on one chromosome and r and S are linked on the homologous chromosome‚ what gametes will be produced if no crossing over occurs? 6) Both you and your sister or brother have attached earlobes‚ but
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