factor that controls the expression of some trait‚ which may be morphological‚ behavioural‚ molecular‚ etc. Each such gene occupies a specific physical locus (pl. loci) on a particular chromosome. Variant forms of these loci are termed alleles. Gene‚ locus‚ and allele are often used more or less interchangeably‚ and this can lead to confusion. Gene is the popular and most general term‚ and is most appropriate when the inherited basis of a trait is emphasized‚ e.g.‚ a “gene” for
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Terms to know: phylogenetic tree inheritance complete dominance character reciprocal cross incomplete dominance trait allele codominance ancestral trait gene pleiotropy derived trait dominant allele multiple alleles synapomorphy recessive allele epistasis homologous character genotype polygenic inheritance analogous character phenotype phenotypic plasticity convergent evolution homozygous norm of reaction adaptation heterozygous X-inactivation natural selection mutant crossing
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W4Q1 Meiosis is the process by which cells divide and create living creatures. Without meiosis we cannot have the process of mitosis‚ which is the process by which cells of tissue are created for living creatures. When meiosis occurs 4 daughter cells are created‚ while only 2 are created in mitosis. With the creation of 2 daughter cells the new cells will be similar to the parent cell‚ but will have differences‚ as there more parent cells involved. When mitosis occurs the daughter cells will be
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Simulate Mendel’s experiments using a dihybrid cross‚ in which he defined the law of independent assortment. Use two physical traits in dragons – Color and body covering. The color locus has two alleles: Green (G) which is dominant‚ and yellow (g) which is recessive. The skin locus also has two alleles: Scaled (S) is dominant to scaleless (s). a. What types of dragons would you use as the parental generation? b. What would be the phenotype(s) of the F1 generation dragons? c. Write out the
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complete the guided notes below. 1. What is probability? 2. In a parent pea plant with the allele pair Gg‚ what is the probability that one gamete will contain the G allele? 3. Complete the graphic organizer to define the characteristics of homozygous and heterozygous genotypes and phenotypes. Homozygous Genotype Phenotype Heterozygous 4. The dominant allele for smooth pod shape in peas is S. The recessive allele for constricted pod shape is s. In the Punnett square‚ show the result of crossing two
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the passage and your own knowledge to answer the questions that follow. Applications of gene therapy Gene therapy has been used to relieve the symptoms of some inherited conditions‚ such as cystic fibrosis. This condition is caused by a recessive allele‚ which
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A Roman Catholic monk‚ Gregor Mendel (1822-1884)‚ was raised on a farm and enjoyed gardening and mathematics. In 1856 he started to experiment with pea plants to explain why certain traits that appeared in one generation did not always reappear in the next generation. During eight years Mendel mixed over 30‚000 plants by controlling their pollination and wanted to know why the results came to be. Mendel noticed that although there were some traits that were common amongst all the pea plants there
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those people because they have alleles for “lefty” and “righty”‚ but only one is normally shown‚ but if you work at it‚ both could be used. For example‚ in the sport of Lacrosse‚ most of the better players’ stick skills are equal on their left hand and right hand. Therefore‚ no gene for handedness should be dominant over the other. After doing some research‚ I have come to the conclusion my theories were incorrect and that handedness has a dominant and recessive allele. According to psychologistworld
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Discussion The goal of the experiment was to determine what gene or genes are responsible for the white eye phenotype of two strains of Drosophila melanogaster. According the literature‚ the w+ gene is located on the X chromosome at 1.5 genetic map units (1). In addition‚ the st+ and bw+ genes are autosomal and assort independently‚ meaning they are two different genes located on two different chromosomes. It is stated that the bw+ gene is located on the 2R chromosome at 104.5 map units (2)
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Scientific Paper 4-10-13 Determining the Unknown Genotype of Corn Plants of the Zea mays Species from the Phenotypes of Offspring Produced Abstract No one particular organism is an exact replica of another. Diversity in the world is key for future generations to adapt to the fast changing world. This lab observed the corn plant of the Zea mays species to determine the genotype for the gene of tall versus dwarf in unknown parent corn plants by observing the seedlings produced. It was hypothesized
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