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23 Cards in this Set

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Weismann confirmed the basic proposals of_______and started a flurry of genetic research.
Mendel
Body chromosomes; determine most traits; 22 pairs
Autosomes
Determine sex and some non-sexual traits; 1 pair
Sex chromosomes
Colchicine interferes with the function of____________
microtubules
Karyotyping involves pictures of chromosomes during_________ of Mitosis
metaphase
Amniocentesis involves sampling the fetal________floating in the amniotic fluid in order to create a_________ to detect chromosome mutations.
cells
karyotype
If two_________ are on the same chromosome, they are in the same linkage group.
gene
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
Thomas Hunt Morgan worked with________sp. (genes species)and discovered linked genes and sex-linked genes.
Drosophilia
Give the genotype of a X-linked carrier female.
b
XX
If a gamete is missing one___________ it is called monosomy, is expressed as 2n-1. One chromosome is without its homologue.
chromosome
Which organism is the WORST candidate for genetic research?
humans
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%
Galactosemia is a genetic disorder where lactos cannot be broken down because of a defective________
enzyme
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
Which is not a chromosome abnormality?
1. Deletion
2. Extra chromosomes
3. Translation
4. Crossing-over
5. Inversion
Crossing-over
Failure of chromosomes to seperate during Meiosis is called___________
non-disjuction
The first genetic disorder was discovered in 1959. It was _________ _________.
Downs Syndrome
1 more or 1 less chromosome; monosomy and trisomy
Aneuploidy
3 or more extra chromosomes (fatal in humana)
Polyploidy
Missing 1 chromosome (Turner's Syndrome XO)
Monosomy
Extra 1 chromosome (Trisomey 21/Down's Syndrome; 3 21s)
Trisomy
The Human Genome Project sequenced about ________ genes.
40,000