Which is one of the seven characteristics that Mendel observed in pea plants?

flower size

seed texture

leaf shape

stem color

The correct answer will be option-seed texture.

Explanation:

Gregor Mendel is known for his experiments on the pea plants by studying the traits of the plants. He observed the seven characters of the pea plants in his experiments:

1. Colour of seed albumen - which is yellow or green

2. The texture of ripe seed - which are smooth or wrinkled

3. Colour of flower - which is purple or white

4. Position of flowers (A) - which are axial or terminal

5. Length of the stem (T) - which are tall or dwarf

6. Form of ripe pods (I) - which are inflated or constricted

7. Colour of unripe pods (G) - which are green or yellow

Thus, the option-seed texture is the correct answer.