Genetics Exam Preparation
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Sample questions with model answers
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Assume that along with the flower colour in snapdragon, stem height also exhibits incomplete dominance. Considering a cross between two snapdragon plants, heterozygous for both stem height and flower colour, which of the following phenotypic ratio will be observed in the F₁ progeny?
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6 : 6 : 3 : 3 : 1 : 2 : 1
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Read the following statements. A. Genes contain the information that is required to express a particular trait in an organism. B. The two alleles of a gene pair are located on non-homologous sites on homologous chromosomes. C. Polygenic inheritance takes into account the influence of environment too. D. DNA helix runs continuously from one end to the other in each chromatid, in a highly supercoiled form. E. Chromosomal disorders can be traced by pedigree analysis. The correct ones are
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A, C and D only
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Gynaecomastia is a feature exhibited by the individual inflicted with a disorder
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Caused by the trisomy of allosomes
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Select the mismatched pair.
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α-Thalassemia – Chromosome 10
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