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(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 |
(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 |
(c)
To determine:
The genotype of F1 generation, when all plants are tall.
Answer to Problem 4A
In F1 generation all plants have tall
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 |
(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 |
(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 |
(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 |
(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 |
(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 |
(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 |
(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 |
(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 |
(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 |
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 |
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