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Mutations
Mutations

... Point mutations affect one nucleotide and can be silent (no harm), missense (potentially bad) or nonsense (really bad). Frameshift mutations are caused by insertions or deletions of nucleotides and affect the size of the protein which is always bad. Chromosomes can have deletions, insertions, duplic ...
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Name

... 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 ...
Biology CP
Biology CP

... Phenotype: A trait that is actually expressed in an organism  Example: RR=Round seeds (physical makeup/appearance) Punnett Square: A chart that shows all the possible gene combination for a cross.  Male and female gametes go on top and side of chart  Inside chart, all the possible gamete combinat ...
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detailed meiosis

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Tandem repeats - Trimble County Schools

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13.2 Notes - Trimble County Schools
13.2 Notes - Trimble County Schools

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The evolution of genomic imprinting and X
The evolution of genomic imprinting and X

... One of the aspects of the PEG10 domain evolution which sets it apart from the other loci was its stepwise evolution. Only PEG10 from this locus was imprinted in marsupials, while the two neighbouring genes from this region, which are imprinted in humans and mice, appeared to be bi-allelically expre ...
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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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