exam 1

Question 1

metaphase

Answer 1

chromosomes lined at the center, centromeres attached to miotic spindle

Question 2

anaphase

Answer 2

sister chromatids separate

Question 3

meiosis recombination begins in

Answer 3

prophase i

Question 4

epistasis

Answer 4

allele of one gene hides the effects of different alleles at a second gene
ratio 9:3:4

Question 5

monohybrid ratio

Answer 5

phenotypic 3:1
genotypic 1:2:1

Question 6

testcross

Answer 6

1:1:1:1

Question 7

monohybrid ratio for lethal mutation

Answer 7

1:2

Question 8

f1 selfed

Answer 8

AaBb x AbBb

Question 9

f1 testcross

Answer 9

AaBb x aabb

Question 10

incomplete penetrance

Answer 10

individual carrying a gene does not always express that trait

Question 11

Barr’s Body

Answer 11

inactive x chromosome

Question 12

dosage compensation

Answer 12

mechanism that balances the dose of the x chromosome in the cells of females

Question 13

turner syndrome

Answer 13

XO female

Question 14

poly / triplo X syndrome

Answer 14

XXX female

Question 15

klinefelter syndrome

Answer 15

XXY male

Question 16

jacob’s syndrome

Answer 16

XYY male

Question 17

sex determination in flies

Answer 17

XX female
XY male
XXY female
XO male
- need two x to be female

Question 18

parental

Answer 18

most common, highest frequency

Question 19

recombination frequency (RF)

Answer 19

(# of recombinants/total offspring) x 100

Question 20

if RF is above 50 %

Answer 20

genes are not linked

Question 21

if RF is below 50 %

Answer 21

genes are linked

Question 22

cis genes

Answer 22

dominant traits are on one chromosome while the recessive traits are on the complementary