Lab -- Analysis of fast plants crosses

Question 1

brassica rapa

Answer 1

type of “fast plant” used in the lab

member of the mustard family

Question 2

diploid number of chromosomes in Brassica rapa

Answer 2

20

Question 3

gene that controls synthesis of purple pigment

Answer 3

anthocyanin

Question 4

anthocyanin

Answer 4

gene that controls synthesis of purple pigment

Question 5

ANL

Answer 5

dominant allele
allows purple pigment to appear
seedlings with this gene have purple stems

Question 6

anl

Answer 6

recessive allele
does not allow pigment to appear
seedlings homozygous for anl have yellow-green stems

Question 7

genetic linkage

Answer 7

examine inheritance of loci that are on the same chromosome

Question 8

test cross

Answer 8

mating in which 1 parent is homozygous recessive at all loci of interest

Question 9

results of a test cross are easy to interpret because…

Answer 9

any potential genetic variations are easily seen in the offspring

Question 10

recombination

Answer 10

gene shuffling

produces gene combinations in the gametes of an organism that are different from the gene combinations that were in the gametes that fused to make that organism

Question 11

map units/centimorgans

Answer 11

unit for distance between genes

Question 12

crossing-over b/n 2 linked genes does not occur ___ of the time

Answer 12

100%

Question 13

crossing-over b/n 2 linked genes is somewhat related to the ___ b/n the genes

Answer 13

distance

Question 14

the ___ the genes, the more likely a break and rejoin (cross-over) will occur b/n them

Answer 14

farther apart

Question 15

the farther apart the genes, the more likely a ___ will occur b/n them

Answer 15

break and rejoin (cross-over)

Question 16

the ___ the genes, the less likely that a cross-over will occur b/n them

Answer 16

closer together

Question 17

the closer together the genes, the less likely that a ___ will occur b/n them

Answer 17

cross-over

Question 18

the farther apart the genes, the ___ likely a cross-over will occur b/n them

Answer 18

more likely

Question 19

the closer together the genes, the ___ likely a cross-over will occur b/n them

Answer 19

less likely