Introduction Drosophila melanogaster is a common fruit fly that has been useful for most experiments in the study of Genetics. The male and the female fruit fly are similar and different in regards to how they look‚ structurally. They are similar because both genders have a head‚ thorax‚ proboscis‚ antennae‚ eyes‚ and mouth parts. However‚ males are smaller than females and have about five abdominal segments as opposed to the seven that the female has. The life cycle of these fruit flies consist
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lactose. [3] The purposes of this lab were to observe different phenotypes and how the bacteria are behaving in different types of media. Four different genotypes of bacteria were used: I+P+Z+‚ I+P-Z+‚ I-P+Z+‚ and I+P+Z-. Genotype I+P+Z+ is the wild type‚ in which everything gene is normal. Genotype I+P-Z+ has mutated gene P‚ which do not allow promoter to bind very well; therefore‚ the level of β-galactosidase is very low. Genotype I-P+Z+ has mutated gene I‚ which make the
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Name: ______________________________________________________ Period:_____ Chapter Review: 10 Mendel & Meiosis College Biology 1. An organism that is true breeding for a trait is said to be (a) homozygous (b) heterozygous (c) a monohybrid (d) a dihybrid 2. At the end of meiosis‚ how many haploid cells have been formed from the original cell? (a) one (b) two (c) three (d) four 3. When Mendel transferred pollen from one pea plant to another‚ he was ___ the plants. (a) self pollinating
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expected offspring from a normally pigmented male with an albino father and an albino wife? 2. A pea plant with red flowers is test crossed and one half of the resulting progeny have red flowers‚ while the other half has white flowers. What is the genotype of the test crossed parent? 3. If we cross two pea plants each heterozygous for yellow seed color genes‚ what would be the expected phenotypic and genotypic ratio among the offspring? 4. In summer squash‚ white fruit color (W) is dominant over
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what would be the phenotypic ratio of chin fissures and dimples in their offspring? –ALL OFFSPRING HAVE CHIN FISSURE & DIMPLES 12. If the father is ""Cc"" for chin fissue allele and the mother is ""Cc"" for chin fissue‚ what will the offspring genotype be using the Punnett Square method. – 1 CC‚
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Plant Genetics JANICE NALBONE Abstract This experiment is being done to show Mendel’s rule of dominance that says certain alleles are dominant and others are recessive. To show this‚ we are using tobacco seeds‚ a monohybrid cross comparing only one trait color. We are also showing Mendel’s law of segregation with a Dihybrid cross comparing two traits of color and texture. Introduction
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dominant or recessive. A dominant allele has a different phenotype than a recessive allele. Phenotypes are simply the observable traits seen in a living organism. An example of phenotype is a dominant allele for hair color is Brown‚ while the recessive allele for hair color is Blonde. They both are for the same gene‚ but are different outcomes of the gene. A dominant allele overrides a recessive allele. In order to have a recessive phenotype‚ two recessive alleles need to be given to the offspring
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Name: ______________________________________ Date: ________________________ Student Exploration: DNA Fingerprint Analysis Vocabulary: codon‚ DNA‚ DNA fingerprint‚ genotype‚ identical twins‚ nitrogenous base‚ phenotype‚ trait Prior Knowledge Questions (Do these BEFORE using the Gizmo.) 1. The two navy officers shown at left are identical twins. Why do you think identical twins look so similar? _______________________________________________
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Achondroplasia In humans achondroplasia is the most common form of non-lethal skeletal dysplasia (short limb dwarfism)‚ affecting over 250‚000 people worldwide. The incidence is approximately one in 10‚000-30‚000 live births. (1-7) Achondroplasia is characterised by short stature (average height of 120-132cm (2‚3)) with disproportionately shorter proximal limb bones‚ a long trunk with a narrow thorax‚ macrocephaly with frontal bossing and mid face hyperplasia. (1-4) People with achondroplasia also
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(Stearns & Koella‚ 2007). The impressive diversity of humans in the planet establishes that each human is unique in their traits and characteristics. Those traits describe our genotype‚ the complete inherited makeup of an organism (Mossler‚ 2011). The genes of both parents play a crucial role in the genotypes and phenotypes of a human being; this predisposition will also be marked by environmental factors that will determined the condition of a child. In the complex elaboration of humans‚ even
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