Exam 4- deviations & gene linkage

Question 1

mendel’s four postulates

Answer 1

Question 2

expected F2 phenotypic ratio:

Answer 2

3:1

Question 3

the chi-squared value is measure of the __ ___ between expected and observed values for a set of measurements

Answer 3

total deviation

Question 4

the chi-square value can tell us ___ ___ our observations are from expected mendelian ratios

Answer 4

how different

Question 5

our observations do not deviate from the expected ratio (no real difference between our observed values and the predicted values, and any apparent differences can be attributed to random chance

Answer 5

null hypothesis

Question 6

the more categories you measure, the more ___ you expect due to ___ ___

Answer 6

deviation; random chance

Question 7

p > (or equal to) 0.05

Answer 7

fail to reject null hypothese
difference is not real

(observed = expected)

Question 8

p < 0.05

Answer 8

reject null hypothesis
difference is real

Question 9

Answer 9

mendelian patterns of inheritance and their associated mendelian ratios, depend on certain conditions (4)

Question 10

genetic phenomenon wherein two genes do not assort independently due to their close physical proximity on a single chromosome

Answer 10

linkage

Question 11

all possible allelic combinations will occur with ___ ___ in gametes if each gene is located on a different chromosome

Answer 11

equal frequency

Question 12

two genes on two different homologous pairs of chromosomes

Answer 12

independent assortment

Question 13

if crossing over did not occur, genes on the same chromosome would never ___ ___

Answer 13

assort independently

Question 14

the frequency with which “crossover” genotypes are produced depends on how frequently crossing over happens _________

Answer 14

between the two genes

Question 15

Answer 15

AB and ab

Question 16

Answer 16

AB or ab

Question 17

Answer 17

Ab or aB

Question 18

50% recombinant gametes is the ___ ___

Answer 18

theoretical limit

Question 19

Answer 19

50% recombinant gametes

Question 20

crossing over occurs: (2)

Answer 20

Question 21

the probability that a crossover event occurs between a given pair of genes is proportional to the ___

Answer 21

physical distance between the two genes

Question 22

genes are close together:

Answer 22

less likely that a crossover will occur between them

Question 23

Answer 23

complete linkage

Question 24

Answer 24

unlinked

Question 25

when two genes are located near each other on the same chromosome, they may be prevented from assorting independently, which alters the frequencies of gamete and progeny genotypes

Answer 25

phenomenon of genetic linkage

Question 26

Answer 26

recessive

Question 27

Answer 27

Question 28

Answer 28

Question 29

Answer 29

Question 30

different allelic combinations can lead to different proportions in the ___ ___

Answer 30

gamete genotypes