What are the characteristics of hybrid tomatoes obtained by crossing red-fruited plants
| June 21, 2021 | education
What are the characteristics of hybrid tomatoes obtained by crossing red-fruited plants of normal growth with yellow-fruited dwarfs. What result will the further crossing of such hybrids give?
M – red
m – yellow
T – normal
t – dwarf
P1: MMTT * mmtt
gametes: MT; mt
F1: MmTt
In the first generation, all hybrids will be of the same type – MmTt – red with normal growth.
P2: MmTt * MmTt
gametes: МТ Мт мТ мт; МТ Мт мТ мт
Ф2: ММТТ ММТт МмТТ МмТт
ММТт ММтт МмТт Ммтт
МмТТ МмТт ммТТ ммТт
МмТт Ммтт ммТт ммтт
When crossing hybrids of the first generation, 9 genotypes are distinguished in the offspring and phenotypes are divided in a ratio of 9: 3: 3: 1.
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