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    Genetics

    Practice problems

    1. You're working on golden rice, a plant that promises to alleviate nutritional deficiencies in some developing countries. You cross two true breeding plants. One parent is has fat grains, wavy leaves, red flowers and is short in stature, while the other parent expresses the contrasting phenotypes of thin grains, straight le

    Genetic Questions

    1. In Burmese cats, brown coat color is dominant to tan coat. Brown coat is a highly prized trait in Burmese. You have a brown male cat that you would like to offer as a stud; therefore, you need to know if it is homozygous or heterozygous for brown coat color. A. Why is this important? B.Diagram a testcross that would det

    Genetic Engineering

    You are a geneticist working for a firm that specializes in plant biotechnology. Explain what specific parts (fruit, seeds, stems, roots, etc.) of the following plants you would try to alter by genetic engineering, what changes you would try to make, and why, on a) corn, b) tomatoes, c) wheat, and d) avocados. Only a few hun

    Meiosis & Sexual Reproduction

    1. First, define Meiosis. Then, define and discuss the "cost of meiosis" (Be sure to list at least 2 references in a References section. 2. Second, speculate on why sexual reproduction has evolved.

    Sex-Linked Traits on Genes Located

    The hemophilia gene is located 12 map units from the red-green colorblindness gene on the X chromosome. Red-green colorblindness is recessive to normal colorvision. A woman with normal blood clotting and normal color vision, but whose father was a hemophiliac and whose mother was red-green colorblind, marries a man who is not a

    Four basic genetics problems

    Practice problems 1. You're working in a lab that studies a particularly gruesome parasite from the Amazon that infests people's ear canals while they sleep. This parasite has a diploid number of 12 chromosomes in its somatic cells, consisting of 6 homologous pairs (i.e. 6 maternal and 6 paternal chromosomes). Another stud

    Antibiotic Resistance

    The evolution of antibiotic resistance in bacterial populations is a direct consequence of natural selection applied by widespread use of antibiotic drugs. When a new antibiotic is first introduced, it kills the vast majority of bacteria exposed to it. The surviving bacterial cells, however, may include individuals whose genomes

    How would you try to alter by genetic engineering the following.

    You are a geneticist working for a firm that specializes in plant biotechnology. Explain what specific parts (fruit, seeds, stems, roots, etc.) of the following plants you would try to alter by genetic engineering, what changes you would try to make, and why, on a) corn, b) tomatoes, c) wheat, and d) avocados. Only a few hun

    Why defendant genes should be considered

    I am thinking polygenic behaviors? I am trying to find reason why genetics is important important aspect in human behavior such as criminal behavior..maybe child molestation for example.

    Ethical considerations of genetics

    I am trying to figure out why a defendant's genes should be considered as a factor in the criminal behavior? Can you help me figure out some pointers and factors?

    AP Bio genetics problem

    In mice, long tails (L) are dominant to short tails (l). Straight whiskers (S) are dominant to curved (s). The genes are unlinked. Two mice are bed many times. The following is a compilation of the F1 data from each mating. 40 long tail, straight whisker 16 long tail, curved whisker 45 short tails, straight whiske

    Can further evolution of antibiotic resistance can or cannot be prevented.

    The evolution of antibiotic resistance in bacterial populations is a direct consequence of natural selection applied by widespread use of antibiotic drugs. When a new antibiotic is first introduced, it kills the vast majority of bacteria exposed to it. The surviving bacterial cells, however, may include individuals whose genomes

    How to Set Up Dihybrid and Sex-Linked Crosses (Punnett)

    How to set up the crosses... I know you take the genotype and set them up in a box but where specifically do the traits go? On a sex link trait question I know that the Y chromosome has nothing to mask it because it is shorter than the X chromosome so do you just leave that genotype off the cross?

    You are a geneticist working for a firm that specializes in plant biotechnology

    You are a geneticist working for a firm that specializes in plant biotechnology. Explain what specific parts (fruit, seeds, stems, roots, etc.) of the following plants you would try to alter by genetic engineering, what changes you would try to make, and why, on a) corn, b) tomatoes, c) wheat, and d) avocados. Only a few hundr

    Mutation rates

    The basic formula for mutation rate is: mutation rate= # mutation events/(gene x generation). consider a situation when a scientist measures the mutation rate in an organism over several generations. if the scientist observes 10 mutant organisms for a particular gene after 4 generations (assuming 100,000 individuals or 100,00

    Using data to solve a genetics problem involving polygenes.

    A cross between two inbred plants that had mean seed weights of 20 and 40 grams, respectively, produced an F1 generation with seeds weighing an average of 30 grams each. an F1 x F1 cross produced 1000 plants: 3 had seeds weighing 20 grams, 5 had seeds weighing 40 grams, and the others produced seeds with weights varying between

    Complementation Minimal Media Plates

    You are handed six yeast strains: three strains (a, b, c) have a defect in the LEU1 complementation group, the other three (d, e, f) have defects in the LEU4 complementation group (LEU being an abbreviation for leucine). if you plate diploid cells, created from mating the haploid strains together, on a minimal media plate with

    Mendel Genetics Problems

    Please see attached word document. --- Assignment Part I - Mendelian Genetics (7.5 pts). Information on the analysis of crosses and Chi-square statistics are available under the supplemental reading section of the course website. Below is the Chi-square probability table at 0.05 (5%) Degrees of Freedom Reject the null

    The Mode of Inheritance and Gene Linkage for Drosophila

    See the attached file. 7. Conclusion and discussion sections: a. how many genes are involved in creating the eye pigment (based on the provided data). Mode of inheritance - are the genes autosomal or sex-linked and why, recessive or dominant and why, and are some genes linked and why. b. Hypothesis statement based on conc

    Help needed

    AP Bio: Preparation of Human Chromosome Spreads- Kit 4 1. Specify the location and function of the centromere. 2. a) Name the three types of chromosomes found in human cells based on the location of the centromere. b) Which type is not found in human cells? 3. Why is it necessary to expose the cells to hypotonic solut

    DNA Questions

    A. Biotechnology cannot be used to: ___________ a. Produce large quantities of particular human proteins. b. Produce effective and safe vaccines. c. Identify human fetuses with particular genetic diseases. d. Alter food plants to increase yield. e. Alter the intelligence levels of newborn infants. B. For these

    Generation of Diversity Purpose

    Explain the purpose (and briefly the method) of generating a TCR transgenic mouse ? Why TCR transgenic mice are often made on a rag-/- background ?

    Evolutionary Preservation of Certain Signaling Pathways

    I need some help for coming up with some reasons as to why certain cell signaling pathways are preserved in species over the course of evolution. Why would natural selection favor a certain basic, primitive pathway when more advanced pathways have been developed in higher organisms? For example, a particular wound-healing p

    MEIOSIS

    Please answer the attached questions about meiosis (attached). --- LAB 10-A 1- With respect to the number of chromosomes, compare interphase of mitosis to interkinesis (between division I and II) of meiosis. 2- Which cell division process (meiosis I, Meiosis II, mitosis, or some combination) corresponds to the following

    Genetics - Tetrad Analysis

    1) In a tetrad analysis of a new ascomyete, you are observing a difference in phenotype between spores- some haploid spores are shaped like a square/cube (S) while other spores are round (r). When a square-spored strain is crossed with a round-spored strain, you observe 698 asci with the pattern (SSSSrrrr), 245 asci with the pat

    Probability - A woman of blood type A and normal color vision...

    A woman of blood type A and normal color vision produced five children as follows: a)male, blood type A, color blind b)male, blood type O, color blind c)female, type A, color blind d)female, type B, normal vision e)female, type A, normal vision of the two men that mated with this woman at different times, man #1 is blo

    Punnett Squares and Pedigrees

    (See attached file for full problem description and diagrams) --- Consider the following five family pedigrees below chosen for study because: 1) two rare conditions are segregating; scaly elbows (X symbol) and a liver disease (filled symbol). 2) the families are large in size. a) What is the mode of inheritance of scaly el