Chapter 10.1, Problem 4A

Summary Introduction

(a)

To determine:

The types of gamete have formed from the male parent having genotype TTGG.

Answer to Problem 4A

Only one type of gamete is formed from the genotype TTGG; is TG.

Explanation of Solution

The separation of alleles during gamete formation and new random combination;

	T	T
G	TG	TG
G	TG	TG

Summary Introduction

(b)

To determine:

The types of gamete have formed from the male parent having genotype ttgg.

Answer to Problem 4A

Only one type of gamete is formed from the genotype ttgg; is tg.

Explanation of Solution

The separation of alleles during gamete formation and new random combination;

	t	t
g	tg	tg
g	tg	tg

Summary Introduction

(c)

To determine:

The genotype of F1 generation, when all plants are tall.

Answer to Problem 4A

In F1 generation all plants have tall phenotype in response to genotype of TtGg .

Explanation of Solution

The fertilization by gametes and formation and new random combination of genotype in zygotes in F1 generation;

	tg	tg
TG	TtGg	TtGg
TG	TtGg	TtGg

Summary Introduction

(d)

To determine:

The genotype of Zygote which is formed by the fertilization of two gametes with TG and TG from male and female plants.

Answer to Problem 4A

In F2 generation, when the gametes with TG and TG from male and female plant will merge during fertilization the resultant zygotes have genotype TTGG .

Explanation of Solution

The fertilization by gametes having genotype of TG and TG results formation and new random combination of genotype in zygotes in F2 generation;

	TG	TG
TG	TTGG	TTGG
TG	TTGG	TTGG

Summary Introduction

(e)

To determine:

The genotype of Zygote which is formed by the fertilization of two gametes with TG and tg from male and female plants.

Answer to Problem 4A

In F2 generation, when the gametes with TG and tg from male and female plant will merge during fertilization the resultant zygotes have genotype TtGg .

Explanation of Solution

The fertilization by gametes having genotype of TG and tg results formation and new random combination of genotype in zygotes in F2 generation

	tg	tg
TG	TtGg	TtGg
TG	TtGg	TtGg

Summary Introduction

(f)

To determine:

The genotype of Zygote which is formed by the fertilization of two gametes with Tg and Tg from male and female plants.

Answer to Problem 4A

In F2 generation, when the gametes with Tg and Tg from male and female plant will merge during fertilization the resultant zygotes have genotype TTgg .

Explanation of Solution

The fertilization by gametes having genotype of Tg and Tg results formation and new random combination of genotype in zygotes in F2 generation.

	Tg	Tg
Tg	TTgg	TTgg
Tg	TTgg	TTgg

Summary Introduction

(g)

To determine:

The genotype of Zygote which is formed by the fertilization of two gametes with Tg and tg from male and female plants.

Answer to Problem 4A

In F2 generation, when the gametes with Tg and tg from male and female plant will merge during fertilization the resultant zygotes have genotype Ttgg .

Explanation of Solution

The fertilization by gametes having genotype of Tg and tg results formation and new random combination of genotype in zygotes in F2 generation

	tg	tg
Tg	Ttgg	Ttgg
Tg	Ttgg	Ttgg

Summary Introduction

(h)

To determine:

The genotype of Zygote which is formed by the fertilization of two gametes with tG and TG from male and female plants.

Answer to Problem 4A

In F2 generation, when the gametes with tG and TG from male and female plant will merge during fertilization the resultant zygotes have genotype TtGG .

Explanation of Solution

The fertilization by gametes having genotype of tG and TG results formation and new random combination of genotype in zygotes in F2 generation;

	TG	TG
tG	TtGG	TtGG
tG	TtGG	TtGG

Summary Introduction

(i)

To determine:

The genotype of Zygote which is formed by the fertilization of two gametes with tG and tG from male and female plants.

Answer to Problem 4A

In F2 generation, when the gametes with tG and tG from male and female plant will merge during fertilization the resultant zygotes have genotype ttGG .

Explanation of Solution

The fertilization by gametes having genotype of tG and tG results formation and new random combination of genotype in zygotes in F2 generation;

	tG	tG
tG	ttGG	ttGG
tG	ttGG	ttGG

Summary Introduction

(j)

To determine:

The genotype of Zygote which is formed by the fertilization of two gametes with tg and TG from male and female plants.

Answer to Problem 4A

In F2 generation, when the gametes with tg and TG from male and female plant will merge during fertilization the resultant zygotes have genotype TtGg .

Explanation of Solution

The fertilization by gametes having genotype of tg and TG results formation and new random combination of genotype in zygotes in F2 generation

	TG	TG
tg	TtGg	TtGg
tg	TtGg	TtGg

Summary Introduction

(k)

To determine:

The genotype of Zygote which is formed by the fertilization of two gametes with tg and tG from male and female plants.

Answer to Problem 4A

In F2 generation, when the gametes with tg and tG from male and female plant will merge during fertilization the resultant zygotes have genotype ttGg .

Explanation of Solution

The fertilization by gametes having genotype of tg and tG results formation and new random combination of genotype in zygotes in F2 generation;

	tG	tG
tg	ttGg	ttGg
tg	ttGg	ttGg

Summary Introduction

(l)

To determine:

The genotype of Zygote which is formed by the fertilization of two gametes with tg and tg from male and female plants.

Answer to Problem 4A

In F2 generation, when the gametes with tg and tg from male and female plant will merge during fertilization the resultant zygotes have genotype ttgg .

Explanation of Solution

The fertilization by gametes having genotype of tg and tg results formation and new random combination of genotype in zygotes in F2 generation;

	tg	tg
tg	ttgg	ttgg
tg	ttgg	ttgg

Conclusion

A male plant with genotype TTGG, producing the gametes (a) TG is crossed with a female plant having genotype ttgg; producing gametes (b) tg, the merger of their gametes at the of fertilization will results in all tall plants with genotype (c) TtGg. When plant from F1 generation is self crossed they will produce the gametes and offsprings of following genotypes;

	TG	Tg	tG	tg
TG	(d) TTGG	TTGg	TtGG	(e) TtGg
Tg	TTGg	(f) TTgg	TtGg	(g) Ttgg
tG	(h) TtGG	TtGg	(i) ttGG	ttGg
tg	(j) TtGg	Ttgg	(k) ttGg	(l) ttgg