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33 Cards in this Set

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