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Sickle cell anemia
a genetic disorder in which erythroctyes take on an abnormal curved or "sickle" shape
chrosomal abnormality in which there is one more than the normal number of chromosomes in a cell
any of several hereditary diseases of the muscular system characterized by weakness and wasting of skeletal muscles
a human genetic disorder caused by a recessive allele for a chloride channel protein; characterized by an excessive secretion of mucus and consquent vulnerability to infection; fatal if untreated (4% whites are carriers - most common lethal genetic disease)
a lymphoma that attacks people in early life and is treatable with radiation therapy
Hershey & Chase
used bacteriophages and radioactive phosphorus in DNA and sulfur to determine what makes up genes
Meselson & Stahl
Used nitrogen isotopes to test the three models of DNA replication; found that semiconservative the most likely model.
Law of Independent assortment
each member of a pair of homologous chromosomes separates independently of the members of other pairs so the results are random
Law of segregation
members of a pair of homologous chromosomes separate during the formation of gametes and are distributed to different gametes so that every gamete receives only one member of the pair
an enzyme that untwists the double helix at the replication forks, separating the two parental strands and making them available as template strands
An enzyme that connects two fragments of DNA to make a single fragment; also called DNA ligase. This enzyme is usedd during DNA replication and is also used in recombinant DNA research.
an enzyme that catalyzes the formation of new DNA and RNA from an existing strand of DNA or RNA
English naturalist who formulated a concept of evolution that resembled Charles Darwin's (1823-1913)
before Darwin - use and disuse (parts that are used become bigger and stronger while other parts deteriorate) and inheritance of acquired characteristics (organism can pass on "modifications" to its offspring
English natural scientist who formulated a theory of evolution by natural selection (1809-1882)
the precursor of a new plant cell wall that forms during cell division and divides a cell into two
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