number of chromosomes and crossing over to get more gene combinations and fertilization‚ involving the fusion of two gametes and the restoration of the original number of chromosomes. 3. Distinguish between the following pairs of terms: Chromosome- structures that makeup DNA Chromatid- DNA wrapped around protein called histone Homologous chromosomes- same but separated Sister chromatids- same but connected by centromere Synapsis- the entire process of pairing two homologous chromosomes Chiasma-
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KARYOTYPING LAB INTRODUCTION The complete set of chromosomes in the body cell of a species is known as karyotype. Karyotype is a test to identify and evaluate the size‚ shape‚ and number of chromosomes in a sample of body cells. Any abnormalities such as extra‚ missing‚ or abnormal positions of chromosome pieces can cause problems with a person growth‚ development and body functions. Karyotype can be used to determine whether the chromosomes of an adult have an abnormality that can be passed on
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Chromosome is in the nucleus of every cell. Each chromosome is mostly made up of coiled DNA. Besides DNA‚ there are also proteins in each Chromosome. The interesting point is that in Chromosome‚ DNA tightly coiled a lot of times around proteins and it supports the basic structure of chromosome. The way that Chromosome forms motivates me to think of how DNA and proteins in the Chromosome relate to each other both in the aspect of location and the aspect of biology function. For the second question
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Introduction For a zygote to contain a diploid complement of chromosomes‚ the gametes‚ which fuse to form this zygote must contain half the number of chromosomes. This reduction of chromosome number occurs in two distinct sequential phases of meiosis‚ termed meiosis I and meiosis II. Both divisional sequences have sub-stages such as‚ prophase (I‚ II)‚ prometaphase (I‚ II)‚ metaphase (I‚ II)‚ anaphase (I‚ II)‚ and telophase (I‚ II) that is continued by cytokinesis (I‚ II)‚ which is not part of meiosis
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over occurs between homologous chromosomes. These are the pairs of chromosomes in an organisms body that carry genes for the same trait located at identical positions on the two chromosomes. Even though they carry the same gene they may‚ however‚ possess different alleles for the gene which result in different forms of the trait. Pre-Lab (3 points): 1. Draw a tetrad in the space below and label the following: centromeres‚ sister chromatids‚ homologous chromosomes. 2. What are the two elements
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A Chromosome Study Lab An examination of the chromosomes of a cell under high magnification can give much information about an organism. Figure 1 shows the chromosomes of a somatic cell as they might appear in an organism if enlarged many times their natural size. A somatic cell is any cell making up the organism except for reproductive cells. In this investigation‚ it is expected that you: a. learn what a chromosome Karyotype is. b. prepare a Karyotype of chromosomes according to the instructions
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Summary of Chromosome 6 by author Robin Cook: Chromosome 6 begins with the murder of an infamous Mafia figure‚ Carlo Franconi. His Mafia competitors are the number one suspects for the shooting‚ and these suspicions rise when Franconi’s body disappears from the morgue before the autopsy is carried out. Medical examiner Jack is confused and interested by the case‚ along with his partner Dr. Montgomery. However‚ their attention is sidetracked by the arrival of a mutilated‚ unidentifiable body that
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Triplo X‚ is a disorder within chromosomes. Our bodies are composed of millions of cells and each cell contains 46 chromosomes inside of its nuclei‚ which acts as the "brain" for the individual cell. Of these chromosomes there are typically 2 sex chromosomes‚ if you are female you will have two X chromosomes‚ and if you are male you will have one X chromosome and one Y chromosome. When someone is diagnosed as having Triple X syndrome they have three X chromosomes‚ thus making it a disorder which
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Using P-element Induced Male Recombination to Generate a Deletion in the DMAP1 Gene on Chromosome Two in Drosophila melanogaster Abstract: The goal of this study was to induce a deletion in the DMAP1 gene on chromosome two in Drosophila melanogaster through P-element mobilization. The DMAP1 gene may be an essential gene‚ however not much is known about it. We attempted to uncover the function of DMAP1 by creating a series of genetic crosses and selecting for brown-eyed non-stubble male flies
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W. HENRY et al.: Polytene Chromosomes of S. (Nevermannia) praelargum UNCORRECTED PROOF Polytene Chromosomes of an Indian Himalayan black fly Simulium (Nevermannia) praelargum (Diptera: Simuliidae) Willie HENRY1‚ Subrata Kumar DEY2‚ Rakesh VARMA1‚ Sachin THAPA1‚ William S PROCUNIER3 1 2 P.G. Department of Zoology‚ Darjeeling Government College‚ Darjeeling‚ West Bengal 734101‚ India School of Biotechnology‚ West Bengal University of Technology‚BF-142‚ Sector 1‚Salt Lake City‚ Kolkata 700064
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