Biology (Concepts & Connections) Ch 9 Part II
Terms
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copy deck
- 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