Figure 1401

1
Figure 14-01
2
LE 14-2
Removed stamens from purple flower
Transferred sperm- bearing pollen from stamens of
white flower to egg- bearing carpel of purple
flower
Parental generation (P)
Stamens
Carpel
Pollinated carpel matured into pod
Planted seeds from pod
Examined offspring all purple flowers
First generation offspring (F1)
3
LE 14-2a
Removed stamens from purple flower
Transferred sperm- bearing pollen from stamens of
white flower to egg- bearing carpel of purple
flower
Parental generation (P)
Stamens
Carpel
Pollinated carpel matured into pod
Planted seeds from pod
4
LE 14-2b
Examined offspring all purple flowers
First generation offspring (F1)
5
LE 14-3
P Generation
(true-breeding parents)
Purple flowers
White flowers
F1 Generation
(hybrids)
All plants had purple flowers
F2 Generation
6
Table 14-1
7
LE 14-4
Allele for purple flowers
Homologous pair of chromosomes
Locus for flower-color gene
Allele for white flowers
8
LE 14-5_1
P Generation
Appearance
Purple flowers PP
White flowers pp
Genetic makeup
Gametes
p
P
F1 Generation
Appearance Genetic makeup
Purple flowers Pp
9
LE 14-5_2
P Generation
Purple flowers PP
White flowers pp
Appearance
Genetic makeup
p
P
Gametes
F1 Generation
Appearance Genetic makeup
Purple flowers Pp
Gametes
p
1
1
P
2
2
F1 sperm
P
p
F2 Generation
P
PP
Pp
F1 eggs
p
Pp
pp
3
1
10
LE 14-6
Phenotype
Genotype
PP (homozygous
Purple
1
Pp (heterozygous
3
Purple
2
Pp (heterozygous
Purple
pp (homozygous
White
1
1
Ratio 121
Ratio 31
11
LE 14-7
Dominant phenotype, unknown genotype PP or Pp?
Recessive phenotype, known genotype pp
If Pp, then 1 2 offspring purple and 1 2
offspring white
If PP, then all offspring purple
p
p
p
p
P
P
Pp
Pp
Pp
Pp
P
P
Pp
Pp
pp
pp
12
LE 14-8
P Generation
YYRR
yyrr
Gametes
yr
YR
YyRr
F1 Generation
Hypothesis of dependent assortment
Hypothesis of independent assortment
Sperm
YR
Yr
yR
yr
1
1
1
1
4
4
4
4
Sperm
Eggs
yr
YR
1
1
2
2
YR
1
4
Eggs
YYRR
YYRr
YyRR
YyRr
YR
1
2
F2 Generation (predicted offspring)
YYRR
YyRr
Yr
1
4
YYRr
YYrr
YyRr
Yyrr
yr
1
2
YyRr
yyrr
yR
1
4
YyRR
YyRr
yyRR
yyRr
1
3
4
4
yr
1
4
Phenotypic ratio 31
YyRr
Yyrr
yyRr
yyrr
9
3
3
3
16
16
16
16
Phenotypic ratio 9331
13
LE 14-9
Rr
Rr
Segregation of alleles into eggs
Segregation of alleles into sperm
Sperm
R
r
1
1
2
2
R
R
r
R
R
1
2
1
1
4
4
Eggs
r
r
R
r
r
1
2
1
1
4
4
14
Table 14-2
15
LE 14-12
AaBbCc
AaBbCc
aabbcc
Aabbcc
AaBbcc
AaBbCc
AABbCc
AABBCc
AABBCC
20/64
15/64
Fraction of progeny
6/64
1/64
16
Figure 14-13
17
LE 14-14a
First generation (grandparents)
Ww
ww
ww
Ww
Second generation (parents plus aunts and uncles)
Ww
ww
Ww
ww
ww
Ww
Third generation (two sisters)
WW
ww
or Ww
No widows peak
Widows peak
Dominant trait (widows peak)
18
LE 14-14b
First generation (grandparents)
Ff
Ff
ff
Ff
Second generation (parents plus aunts and uncles)
FF or Ff
ff
ff
Ff
Ff
ff
Third generation (two sisters)
ff
FF or Ff
Free earlobe
Attached earlobe
Recessive trait (attached earlobe)
19
Figure 14-15
20
Figure 14-16