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33 Cards in this Set
- Front
- Back
percent of recombination is correlated with gene _____
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distance
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the further apart, the (more or less) recomb that can occur
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more
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recomb freq =
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number recomb/total progeny
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given 16 mu what do you know about percent of recombs
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8 percent of each recomb
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what is your null hypothesis for linked
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that they are not linked
rejection will show that they are indeed linked |
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how do you calculate chance of DCO
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multiply chance of each SCO and if asked you multiply this by total number to see how many expected
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define interference
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degree one crossover affects other crossovers from occuring
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what determines sex in humans
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SRY
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are females homogametic or heterogametic
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homo
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who uses ZZ ZW
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birds ZZ males
ZW females |
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how do bees determine sex
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haplodiploidy
haplo males dip females |
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what do worms use to determine sex
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XX XO
XX females XO males |
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how do flies determine sex
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X to autosome ratio
2 2 female 1 2 male |
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what are three mechanisms of dosage compensation
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drosophilia inc expression of Y
C elegans turn down X in females mammals randomly turn off X |
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what causes calico cats
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dosage compensation
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what is aneuploidy
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2n + 1
monosomy or trisomy |
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what is polypoidy
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change in the entire n number
2n 3n etc. |
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what happens if nondisjunction in M I
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two trisomic
two monosomic |
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what if nondisjunction in MII
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one trisomic
one monosomic two normal |
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what are two types of polyploidys
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auto
allo |
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what is the difference between auto and allopolyploidy
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auto all chromosomes come from same organism
allo two orgs are involved |
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what are three types of translocations
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nonreciprocal
reciprocal robertson |
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what are three examples of chromosome rearrangements
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duplicatoins
deletions inversions |
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what does a duplication lead to
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duplication loop
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what is an example of a deletion
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cri du chat
missing small arm of 5 |
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what are two kinds of inversions
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para
peri |
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what are the results of paracentric
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two centromeres
no centromeres duplication and eletion of two |
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what are the results of pericentrict inversion
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all have centromeres
duplication and deletion of two |
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the further two genes are apart, th emore inaccurate the estimate of their distances are because ______
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only odd numbers of crosses can be counted
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if you cross diploid female 32 with haploid male 9 how many somatic cells would you see in the female offspring
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25
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47m XXX could be caused by all of the following except
a. can be caused by nondis in MI in the oocyte b. can be caused by nondis in MII in the oocyte c. can be caused by nondis in MI in the spermatocyte d. nondis in MII in the spermatocyte e. all of the above |
e
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the effect of barr body formation in mammals is that.
a. females are mosaics for heterozy X linked genes b. males are mosaics for heterozy autosomal genes c. males are mosaics for hemizygous X linked genes d. females are mosaics forf homozygous x linked genes e. females are mosaics for heterozy autosomal genes |
a
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list four basic types of rearrangements
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translocations
duplication delection inversion |