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23 Cards in this Set
- Front
- Back
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Weismann confirmed the basic proposals of_______and started a flurry of genetic research.
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Mendel
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Body chromosomes; determine most traits; 22 pairs
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Autosomes
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Determine sex and some non-sexual traits; 1 pair
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Sex chromosomes
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Colchicine interferes with the function of____________
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microtubules
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Karyotyping involves pictures of chromosomes during_________ of Mitosis
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metaphase
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Amniocentesis involves sampling the fetal________floating in the amniotic fluid in order to create a_________ to detect chromosome mutations.
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cells
karyotype |
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If two_________ are on the same chromosome, they are in the same linkage group.
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gene
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Which does NOT apply to linked genes:
1.Will appear together in a gamete 2.Can be sparated by crossing-over 3.Tend to be inherited together 4.Far apart linked genes rarely separate |
Far apart linked genes rarely separate
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Thomas Hunt Morgan worked with________sp. (genes species)and discovered linked genes and sex-linked genes.
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Drosophilia
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Give the genotype of a X-linked carrier female.
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b
XX |
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If a gamete is missing one___________ it is called monosomy, is expressed as 2n-1. One chromosome is without its homologue.
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chromosome
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Which organism is the WORST candidate for genetic research?
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humans
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What is the probability of producing a normal child?
Autosomal recessive Aa x Aa ______% Autosomal dominant Aa x aa ______% Sex-linked recessive XX(a) x XY ___% Sex-linked dominant XX(A) x XY ___% |
75%
50% 75% 50% |
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Galactosemia is a genetic disorder where lactos cannot be broken down because of a defective________
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enzyme
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Which does not apply to hemophilia?
1. Y-linked trait 2. Rare in the human population 3. More common among men 4. Sex-linked genetic disorder |
Y-linked trait
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Which is not a chromosome abnormality?
1. Deletion 2. Extra chromosomes 3. Translation 4. Crossing-over 5. Inversion |
Crossing-over
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Failure of chromosomes to seperate during Meiosis is called___________
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non-disjuction
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The first genetic disorder was discovered in 1959. It was _________ _________.
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Downs Syndrome
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1 more or 1 less chromosome; monosomy and trisomy
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Aneuploidy
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3 or more extra chromosomes (fatal in humana)
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Polyploidy
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Missing 1 chromosome (Turner's Syndrome XO)
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Monosomy
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Extra 1 chromosome (Trisomey 21/Down's Syndrome; 3 21s)
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Trisomy
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The Human Genome Project sequenced about ________ genes.
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40,000
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