lab 6

Question 1

what plant are we using in this lab?

Answer 1

Wisconsin fast plants

Question 2

wisconsin fast plants are a variety of…

Answer 2

Brassica rapa

Question 3

pollination of Brassica rapa flowers in nature

Answer 3

insects, primarily bees

Question 4

pollination of Wisconsin fast plants indoors

Answer 4

hand pollinated

Question 5

how many hours will we grow the seeds

Answer 5

48

Question 6

what family is Brassica rapa a member of

Answer 6

common garden vegetables such as radish, mustard, cabbage, and cauliflower

Question 7

reproductive parts of the plant

Answer 7

flowers

Question 8

fertilization

Answer 8

pollen transferred from one plant to another

Question 9

hybrid

Answer 9

plant that results from cross between 2 parent plants with different genetic types

Question 10

monohybrids

Answer 10

if parent plants differ in just 1 set of contrasting phenotypes

Question 11

dihybrids

Answer 11

if parent plants differ in just 2 sets of contrasting phenotypes

Question 12

what generation of seeds will we be given in lab

Answer 12

F2

Question 13

is lab a dihybrid or monohybrid cross

Answer 13

dihybrid

Question 14

possible phenotypes in lab

Answer 14

• long stem : short stem (Rosette-dwarf)
  -Purple stem : non-purple stem

Question 15

how far apart are unlinked genes

Answer 15

50 mu

Question 16

how are we expecting each phenotype pair to segregate

Answer 16

3/4 dominant
1/4 recessive

Question 17

what ratio is typical of dihybrid cross

Answer 17

9:3:3:1

Question 18

are long or short stems dominant

Answer 18

long

Question 19

are purple or non-purple stems dominant

Answer 19

purple

Question 20

what analysis are we using at the end

Answer 20

chi-square

Question 21

any variations of observed results from expected results are due to __________

Answer 21

chance (null chance hypothesis)

Question 22

chi-square test

Answer 22

how well observed ratios fit expected ratios

Question 23

formula for chi-square

Answer 23

sum of (obs-exp)^2 / exp

Question 24

degrees of freedom

Answer 24

one less than number of dif phenotypes possilbe

Question 25

if percent variation of observed results from expected results is greater than 0.5, what do we accept?

Answer 25

null hypothesis