A is 0.5. a. What is the frequency of the homozygous dominant genotype (AA)? b. What is the frequency of the heterozygous genotype (Aa)? 2. If 16% of the individuals in a population at genetic equilibrium are recessive (aa). a. What is the frequency of the recessive allele in the population? b. What is the frequency of the dominant allele? 3. If the genotype frequencies in a population at genetic equilibrium are 0.36 TT‚ 0.48 Tt
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an organism’s genotype determine its phenotype? A person’s genotype comes directly from their genetic makeup‚ whereas a person’s phenotype relates directly to their physical attributes via protein development. The two are intertwined by the process of synthesis with transcription and translation. DNA is transcribed into RNA which then uses that DNA as a template to translate into a polypeptide forming the trait or attribute. Depending on the DNA or genotype‚ the RNA or phenotype is conversely
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* Meiosis – cell division for gamete production * In specialized tissues * Produces cells with the 1n chromosome number * Two Divisions * Meiosis I separates homologous chromosomes * Meiosis II separates sister chromisis * Asexual Reproduction * Mitotic division * Identical offspring * Sexual Reproduction * Fuse gametes from parents (syngamy) to produce a zygote * Each parent contributes half the genetic material * Increase the diversity of
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Terms Genotype: a set of alleles (RR or rr) Phenotype: physical trait (round or wrinkled) Punnett Square: A grid system for predicting all possible genotypes Monohybrid: a cross that examines the inheritance of one trait Dihybrid: a cross that examines the inheritance of two traits Genetics Key Terms Continued Independent assortment: alleles of different genes separate independently of one another Incomplete dominance: A heterozygous phenotype that is a blend of the two homozygous phenotypes Codominance:
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__________ flowers __________ __________ __________ __________ a: the phenotype of the parents: b: the genotype of the parents: c: complete Punnett’s Square for the F1 generation: F1 [question 2 - continuation] d: The ratio of genotypes of the possible offspring. {write out the genotypes (symbols) and the number of each of them} e: The ratio of phenotypes of the possible offspring. {write out the phenotypes (word) and the number of each of them} 3. (30 pts) What is the value of transgentic
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arise‚ from the base sequence of DNA through to the observed phenotype. Genes come in different varieties‚ called alleles. Somatic cells contain two alleles for every gene‚ with one allele provided by each parent of an organism. Genotype refers to the information contained in an organisms DNA‚ or genetic material. Its phenotype is the physical expression of its genotype. Although every creature is born with a fixed genotype‚ the phenotype is a variable influenced by many factors in the animal’s environment
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results be produced by cross-pollinating two different F1 plants? Answer: No‚ the results would be different. While self pollination produces 3 : 1 ratio of yellow versus gene phenotype‚ cross pollination would result in 1 : 1 ratio‚ in the F2. This is because F1 yellow are heterozygous‚ while green are homozygous genotypes. 2. In the right-hand part of Figure 2-4‚ in the plant showing an 11 : 11 ratio‚ do you think it would be possible to find a pod with all yellow peas? All green? Explain
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Explain the structure and inheritance of genes (15 marks) A cell’s nucleus contains chromosomes‚ which are long‚ coiled packaged and organized chromatin (molecules of DNA). Chromatin is a complex of molecules found in cells‚ consisting of DNA‚ protein and RNA. Proteins are polypeptides (a large sequence of amino acids). The chief protein component of chromatin are histones‚ which package and order the DNA into structural units called nucleosomes in order to fit in the cell‚ as well as reinforce the
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Biology Test- Chapter 11: Introduction to Genetics Multiple Choice Identify the choice that best completes the statement or answers the question. 1. Gregor Mendel used pea plants to study a. flowering. b. gamete formation. c. the inheritance of traits. d. cross-pollination. 2. Offspring that result from crosses between true-breeding parents with different traits a. are true-breeding. b. make up the F2 generation. c. make up the parental generation. d. are called hybrids. 3. The chemical
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shows the occurrence of sickle cell anaemia within one family. Figure 1 A pedigree diagram showing the occurrence of sickle cell anaemia within one family. a Look at the family tree in Figure 1 above and using suitable symbols suggest what the genotype of individual 6 might be. Give a reason for your answer. Unaffected female b If individuals 7 and 8 have children‚ state what proportion of their children would be expected to be carriers of the sickle cell anaemia allele. 3/4 Q3 Huntington’s
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