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Microsoft Word - ctb
Microsoft Word - ctb

... *What does DNA look like in different cells? * How does DNA help make proteins? * What happens if a gene changes? *What is heredity? *How did Gregor Mendel study heredity? *Explain meiosis Heredity Use the terms from the following list to complete the sentences below. Each term maybe used only once. ...
Case report
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BIO 208 - Genetics - Bishop`s University
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BIO 290
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bio 15 midterm exam 2 qa 141112
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BIO 103 - Jefferson State Community College
BIO 103 - Jefferson State Community College

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Cloning of the ALL.1 Fusion Partner, the AF
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Heredity - bvsd.k12.pa.us
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Mitosis, Meiosis and Fertilization Teacher Prep Notes
Mitosis, Meiosis and Fertilization Teacher Prep Notes

...  The body needs to be able to produce new cells for growth, development and repair.  Each cell has DNA molecules (containing genes) organized in chromosomes.  46 chromosomes in each human cell* = 23 pairs of homologous chromosomes *with a few exceptions, e.g. gametes and red blood cells  For eac ...
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... By using a probe synthesized on the basis of the published cDNA sequence, clones were isolated from a human genomic library spanning most of the intron centromeric to the fifth reported AMLl exon.7 This is the region where chromosome 21 breakpoints were suggested to cluster in the t(8;21). As the in ...
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... their X chromosome. o X-linked traits most likely will be _______________to the normal condition and the Y chromosome lacks the gene for a trait, so males have a higher chance of having the disorder.  These traits generally do NOT show up in ______________ since females have genes on both their X c ...
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X-inactivation



X-inactivation (also called lyonization) is a process by which one of the two copies of the X chromosome present in female mammals is inactivated. The inactive X chromosome is silenced by its being packaged in such a way that it has a transcriptionally inactive structure called heterochromatin. As nearly all female mammals have two X chromosomes, X-inactivation prevents them from having twice as many X chromosome gene products as males, who only possess a single copy of the X chromosome (see dosage compensation). The choice of which X chromosome will be inactivated is random in placental mammals such as humans, but once an X chromosome is inactivated it will remain inactive throughout the lifetime of the cell and its descendants in the organism. Unlike the random X-inactivation in placental mammals, inactivation in marsupials applies exclusively to the paternally derived X chromosome.
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