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10 notecards = 3 pages (4 cards per page)

Viewing:

AP BIO CHAPER 12 ART QEUSTIONS + SCENERIO

front 1

Between which two genes would you expect the highest frequency of recombination?
A) A and W
B) W and E
C) E and G
D) A and E
E) A and G

back 1

A and G

front 2

In a series of mapping experiments, the recombination frequencies for four different linked
genes of Drosophila were determined as shown in Figure 12.2. What is the order of these genes
on a chromosome map?
A) rb-cn-vg-b
B) vg-b-rb-cn
C) cn-rb-b-vg
D) b-rb-cn-vg
E) vg-cn-b-rb

back 2

b-rb-cn-vg

front 3

Which of the following are the phenotypes of the parents in this cross?
A) 2 and 5
B) 1 and 6
C) 4 and 8
D) 3 and 7
E) 1 and 2

back 3

4 and 8

front 4

In which progeny phenotypes has there been recombination between genes A and B?
A) 1, 2, 5, and 6
B) 1, 3, 6, and 7
C) 2, 4, 5, and 8
D) 2, 3, 5, and 7

back 4

1, 2, 5, and 6

front 5

If recombination frequency is equal to distance in map units, what is the approximate distance
between genes A and B?
A) 1.5 map units
B) 3 map units
C) 6 map units
D) 15 map units
E) 30 map units

back 5

3 map units

front 6

What is the greatest benefit of having used a testcross for this experiment?
A) The homozygous recessive parents are obvious to the naked eye.
B) The homozygous parents are the only ones whose crossovers make a difference.
C) Progeny can be scored by their phenotypes alone.
D) All of the progeny will be heterozygous.
E) The homozygous recessive parents will be unable to cross over.

back 6

Progeny can be scored by their phenotypes alone.

front 7

The greatest distance among the three genes is between a and c. What does this mean?
A) Gene c is between a and b.
B) Genes are in the order: a–b–c.
C) Gene a is not recombining with c.
D) Gene a is between b and c.
E) Distance a–b is equal to distance a–c.

back 7

Genes are in the order: a–b–c.

front 8

How many of their daughters might be expected to be color-blind dwarfs?
A) all
B) none
C) half
D) one out of four
E) three out of four

back 8

none

front 9

What proportion of their sons would be color-blind and of normal height?
A) none
B) half
C) one out of four
D) three out of four
E) all

back 9

half

front 10

They have a daughter who is a dwarf with normal color vision. What is the probability that
she is heterozygous for both genes?
A) 0%
B) 25%
C) 50%
D) 75%
E) 100%

back 10

100%