In tomatoes, the gene for normal growth, R, dominates over the dwarfism gene r. What will be the generation

In tomatoes, the gene for normal growth, R, dominates over the dwarfism gene r. What will be the generation from crossing homozygous tall plants with dwarf ones? From crossing heterozygous plants? From crossing a heterozygous plant with a dwarf plant?

Homozygous tall tomatoes, according to the designations introduced in the problem statement, are RR. They will produce R.

Homozygous dwarf tomatoes will be rr, the germ cells they produce will be r.

When crossing, we get the same type of Rr offspring, which has a high growth in 100% of cases.

Heterozygous Rr tomatoes produce two types of germ cells: r and R. When crossing them, we get the following offspring options: 25% – tall homozygous RR tomatoes, 50% – tall heterozygous Rr tomatoes, 25% – dwarf homozygous rr tomatoes.

If you cross the heterozygote Rr with a dwarf tomato rr, we get the following offspring: 50% – Rr: tall tomatoes, 50% – rr: dwarf tomatoes.



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