Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| define incomplete dominance | when 2 alleles don't mask each other
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| define sex-linked trait | usually carried on x chromosomes
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| define mutation | change in DNA
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| define chromosome mutations | changes in structure of the chromosome or is a loss of an entire chromosome
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| define deletion | a piece of chromosome breaks off
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| define inversion | a piece of chromosome breaks off and reattaches itself in opposite direction
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| define translocation | a piece of chromosome breaks off and reattaches itself to a non homologous chromosome
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| define nondisjunction | replicated chromosomes do not break apart so one cell has an extra chromosome and one cell has one less
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| what are the examples of nondisjunction | Downs syndrome, Turners syndrome, XYY, Kinefelters, Polygenetic traits
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| what is Downs Syndrome | a person has an extra 21st chromosome
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| what is Kinefelters | mentally challenged
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| what is Turners syndrome | immature physical development
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| what is XYY | linked men to violent crimes
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| what is polygenetic traits | controlled by more than 1 gene
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| what are the 4 roles of nondisjunction | how traits are inherited, explain characteristics, determine probability, use pedigrees and karyotypes
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| 3 characteristics of karyotype | pictures of chromosomes, identifying nondisjunction, can see extra or missing chromosome
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| define amniocentesis | insert a large needle into uterus and remove amniotic fluid
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| define fetoscopy | insert a camera or surgical tools
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| define ultrasound | bounce sound waves to produce an image
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| define pedigree | a record that traces how a trait is inherited
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| what is a gene transfer | insert genetic material into virus which takes it to body cells and attacks them
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| define genetic engineering | insert DNA from one organism to another
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