from chromosome 13. The chromosomal condition is often associated with a severe intellectual disability and several physical abnormalities. Patau’s occurs in about 1 in 16‚000 infants. Women of all ages have a chance of giving birth to a child with this condition‚ but the risk increases as the woman gets older. Trisomy 13 is caused by the nondisjunction of chromosomes during meiosis and sometimes translocation‚ the rearrangement of genetic material between chromosome 13 and another chromosome. Individuals
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builds up in the liver‚brain and eyes. Wilson’s disease is an autosomal recessive trait. (Autosomal recessive trait: means two copies of an abnormal gene must be present in order for the disease or trait to develop) Wilson disease is located on chromosome 13. The gene is called ATP7B and it contains the genetic information necessary to make a copper transport copper out of the liver. Mutations in the gene lead to an abnormal copper transport
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High School Biology - Core Concept Master Cheat Sheet Biology‚ 1 of 6 01: The Science of Biology 03: The Cell • Characeristics of life Organization: all lives are well organized Energy use: all lives need energy to support Reproduction: all lives should be able to reproduce itself Growth: all lives grow and develop. Response to stimuli: all lives can respond to internal or external stimuli Homeostasis: all lives have the ability to maintain a relatively stable internal environment—self-regulation
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the most common genetic disorder affecting more than 5‚000 babies born in the United States each year. This syndrome occurs when one chromosome has an extra “part‚” an error occurs in cell division‚ or an extra chromosome exists resulting in 47 chromosomes. Most people are born with 23 pairs of chromosomes‚ for a total of 46. When the body produces an extra chromosome or genetic material‚ it alters the way the body develops. How is the health of a baby born with Down syndrome affected? Babies with
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described a syndrome consisting of multiple congenital anomalies‚ mental retardation‚ microcephaly‚ abnormal face‚ and a mewing cry in infants with a deletion of a B group chromosome (Bp-)‚ later identified as 5p- WHAT IS CRI DU CHAT SYNDROME? Cri-du-chat syndrome is an autosomal deletion syndrome caused by a partial deletion of chromosome 5p and is characterized by a distinctive‚ high-pitched‚ catlike cry in infancy with growth failure‚ microcephaly‚ facial abnormalities‚ and mental retardation throughout
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human genetics. Research has proven that humans and dolphins have more in common than they thought they have. An experiment from Texas A&M University tried to apply human chromosomes with the dolphin chromosomes‚ and they have discovered that out of the 22 dolphins 13 dolphin chromosomes were similar to human chromosomes. They have also found 3 other genes that was similar to human genes. There has been many studies of dolphins and up to this moment scientists still wonder how humans and
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and cytokinesis. In prophase‚ chromatin condenses and the nucleoli disappears. What we know as chromosomes‚ which consist of two identical sister chromatids joined together at centromers‚ begin to appear. Mitotic spindle is formed and the centromers start moving to opposite poles‚ propelled by the lengthening microtubules that they shoot out. In metaphase‚ the longest stage of mitosis‚ the chromosomes line up on the metaphase plate and the centromeres have already migrated to opposite poles.
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genes on the same chromosome are close together‚ they may be inherited as a single unit. For example‚ in fruit flies the genes determining the eye color and wing length are inherited together. This is called a linkage group. 2) Sex-linked inheritance‚ also deviates from Mendel’s idea of the Law of Independent Assortment‚ because sometimes‚ the X chromosome can also have linked to it the gene for hemophilia or color-blindness. Thus‚ while inheriting one of their sex chromosomes‚ a person at the same
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single or multi celled. 2. The size of the cells – prokaryotic cells are really extremely tiny while eukaryotic cells are just extremely tiny. 3. The DNA structure – prokaryotic cells are a single circular chromosome attached to the cell wall while eukaryotic cells are linear chromosomes in a nucleus floating in the center of the cell. Choose two internal structures of prokaryotic cells and three from eukaryotic cells and describe their function in your own words. |Cell Structures
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are not formed the human body will stop working within a few minutes. The cell cycle is defined as an orderly sequence of events in which a somatic cell duplicates its contents and divides in two. When a cell reproduces‚ it must replicate all its chromosomes to pass its genes to the next generation of cells. The cell cycle consists of two major periods: interphase‚ when a cell is not dividing‚ and the mitotic phase‚ when a cell is dividing. During interphase the cell replicates its DNA. Interphase is
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