To determine the number that should replace the letter [tex]\( x \)[/tex] in the "Seed color" row of Mendel's results, we need to know the relationship between the green seeds and the total number of seed plants.
Given the following information:
- Total number of seed plants = 18,066
- Number of yellow seeds = 6,022
The sum of the number of green seeds and yellow seeds should equal the total number of seed plants. Therefore, we subtract the number of yellow seeds from the total number of seed plants to find the number of green seeds.
[tex]\[ x = \text{Total number of seed plants} - \text{Number of yellow seeds} \][/tex]
[tex]\[ x = 18,066 - 6,022 \][/tex]
[tex]\[ x = 12,044 \][/tex]
So, the number that should replace [tex]\( x \)[/tex] in the "Seed color" row is:
[tex]\[ 12,044 \][/tex]