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Genetics Exam 1
Midterm Information
29
Biology
Undergraduate 3
01/27/2010

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Term
Human Genome
Definition
23 chromosome pairs
22 pairs of autosomes
1 pair of sex chromosomes
Term
p-arm
Definition
the short arm of the chromosome
Term
q-arm
Definition
the long arm of the chromosome
Term
metacentric
Definition
centromere located in the center of the chromosomes
Term
submetacentric
Definition
centromere located slightly above the center of the chromosomes
Term
acrocentric
Definition
centromere located much higher above the center of the chromosomes
Term
telocentric
Definition
centromere located at the top of the chromosomes
Term
mitosis
Definition
goal is to make two genetically identical daughter cells
Term
meiosis
Definition
goal is to make gamete haploids
Term
mitosis interphase
Definition
nuclear envelope/membrane is present, relaxed chromain
Term
mitosis prophase
Definition
chromosome condenses, sister chromatids, spindle fiber formation
Term
mitosis prophase
Definition
nuclear membrane disintegrates, spindle fibers attach
Term
mitosis metaphase
Definition
chromosomes align on equatorial plate
Term
mitosis anaphase
Definition
sister chromatids seperate and move toward opposite poles
Term
mitosis telophase
Definition
chromosomes arrive at poles, nuclear membrane reforms
Term
mitosis telophase
Definition
chromatin begins to relax, cleavage furrow forms
Term
meiosis prophase 1
Definition
chromosomes condense, dyads visible, crossing over between homologous chromosomes
Term
meiosis metaphase 1
Definition
homologous pairs line up along the equatorial plate
Term
meiosis anaphase 1
Definition
homologous pairs separate and move toward opposite poles.
Term
meiosis anaphase 1
Definition
sister chromatids remain attached at the centromere
Term
meiosis telophase 1
Definition
chromosomes arrive at opposite poles, cleavage furrow forms, cytokenesis follows
Term
True
Definition
T/F The second meiotic division is analagous to a mitotic division in that there is no rediction of genetic information
Term
meiosis prophase II
Definition
chromosomes recondense
Term
meiosis metaphase II
Definition
chromosomes line up individually along the equatorial plate. (post crossing over occurs)
Term
meiosis anaphase II
Definition
sister chromatids now separate and move toward opposite poles.
Term
meiosis telophase II
Definition
chromosomes arrive at opposite poles, cytokenesis follows (4 new cells present)
Term
Independent Assortment (random assortment) and Recombination (crossing-over)
Definition
Two phenomena contributing to the generation of genetic variability during meiosis.
Term
prophase I meiosis
Definition
where recombination occurs
Term
anaphase meiosis 1
Definition
when random assortment occurs
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