figure 11.2 page 178
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Slide 1
Figure 11.2Page 178
Slide 2
A pair of homologous chromosomes
A gene locus
A pair of alleles
Three pairs of genes
Figure 11.4Page 179
Slide 3
Aa
fertilization produces heterozygous offspring
AA
AA
aa
aa
meiosis I
A A A A a a a a
meiosis II
gametes
Stepped Art
Figure 11.4Page 180
AA
A
AA
aa
aa
aa
(chromosomes duplicated before
meiosis)
Homozygous dominant parent
Homozygous recessive parent
A
Slide 4
Trait Studied
Dominant Form
Recessive Form
F2 Dominant-to- Recessive Ratio
SEED SHAPE
SEED COLOR
POD SHAPE
POD COLOR
FLOWER COLOR
FLOWER POSITION
STEM LENGTH
2.96:1
3.01:1
2.95:1
2.82:1
3.15:1
3.14:1
2.84:1787 tall 277 dwarf
651 long stem 207 at tip
705 purple 224 white
152 yellow428 green
299 wrinkled882 inflated
6,022 yellow 2,001 green
5,474 round 1,850 wrinkled
Figure 11.5Page 180
Slide 5
POSSIBLE EVENT: PROBABLE OUTCOME:
sperm A meets egg A sperm A meets egg a sperm a meets egg A sperm a meets egg a
1/4 AA offspring 1/4 Aa 1/4 Aa 1/4 aa
In-text figurePage 178
Slide 6
aA
aaAa
A
a
aA
aaAa
AaA
a
aA
aaAa
AaAAA
a
aA
a aa
A
female gametes
mal
e g
amet
es
Stepped Art
Figure 11.6Page 181
Slide 7
True-breedinghomozygous recessiveparent plant
True-breedinghomozygous dominantparent plant
An F1 plantself-fertilizesand producesgametes:
F1 PHENOTYPES
F2 PHENOTYPES
aa
Aa
AA
aaAa
Aa
Aa Aa
Aa Aa
Aa Aa
Aa Aa
Aa
Aa
AA
aa
A
A
A
A
a a
a
a
AA
Figure 11.7Page 181
Slide 8
AABB aabb
x
AaBb
AB AB ab ab
TRUE-BREEDING PARENTS:
GAMETES:
F1 HYBRID OFFSPRING:
purple flowers, tall
white flowers,dwarf
In-text figurePage 182
Slide 9
metaphase IC C C C
D D DD
c c c c
dd d d
OR
C C C C
D D D D
cc cc
dd d d
metaphase II
Stepped Art
Figure 11.8Page 182
1/4 CD 1/4 cd
CCDD
ccd d
gametes1/4 Cd 1/4 cD
CCDD
ccd d
gametes
Slide 10
AB ab
AABBpurple-
floweredtall parent
(homozygousdominant)
aabbwhite-
flowereddwarf parent(homozygous
recessive)
F1 OUTCOME: All F1 plants purple-flowered, tall(AaBb heterozygotes)
X
AaBb
Figure 11.9 (1)Page 183
Slide 11
1/16aabb
white-flowered, dwarf
1/16aaBB
1/16aaBb
1/16aaBb
white-flowered, tall
1/16Aabb
1/16Aabb
1/16AAbb
purple-flowered, dwarf
Stepped Art
Figure 11.9(2)Page 183
purple-flowered, tall1/16
AABB1/16
AABb1/16
AaBB1/16
AaBb
1/16AABb
1/16AaBb
1/16AaBB
1/16AaBb
1/16AaBb
AaBbAaBb
1/4 AB 1/4 Ab 1/4 aB 1/4 ab
1/4AB
1/4Ab
1/4aB
1/4ab
Slide 12
Xhomozygous parent homozygous parent
All F1 are heterozygous
X
F2 show three phenotypes in 1:2:1 ratio
Stepped Art
Figure 11.10Page 184
Slide 13
Range of genotypes:
Blood types:
IA IA
IA i IA IB IB i
IB IB
ii
A AB B O
or or
ABO Blood Typing
Figure 11.11Page 184
Slide 14
Ribbon model for two calcium-binding domains of fibrillin
Figure 11.12Page 185
Slide 15
bbeeBBEE X
F1 puppies are all BbEe
BBEE
BBEe
BbEE
BbEe Bbee
BbEe
Bbee
BBEe BbEE BbEe
BBee BbEe
bbeebbEe
bbEE bbEe
BE Be bE be
BE
Be
bE
be
black
brown
yellow
F2 puppies
Stepped Art
Figure 11.13Page 186
Slide 16
9/16 walnut 3/16 rose 3/16 pea 1/16 singlerrpp
RRpp(rose comb)
rrPP(pea comb)
RrPp (all walnut comb)
P:
F2:
F1:
X
RRPPRRPpRrPPRrPp
RRppRrpp
rrPPrrPp
Comb Shape in Poultry
Figure 11.15Page 187
Slide 17
Range of values for the trait
Nu
mb
er o
f in
div
idu
als
wit
hso
me
valu
e o
f th
e tr
ait
line of bell-shaped curve indicates continuous variation in population
Figure 11.17bPage 189
Slide 18
Stepped Art
Figure 11.18Page 190
Slide 19
Hei
gh
t (c
enti
me
ters
)H
eig
ht
(cen
tim
ete
rs)
Hei
gh
t (c
enti
me
ters
)
60
60
60
0
0
0
Mature cutting at medium elevation (1,400 meters)
Mature cutting at high elevation (3,050 meters)
Mature cutting at low elevation (30 metersabove sea level)
Figure 11.19Page 190
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