Answer:
(3) used cross breeding to purposely breed plants
(4) studied a variety of pea plant traits
(6) studied several generations of plants
Step-by-step explanation:
In order to breed or cross one plant with another, Mendel opened the petals and removed the anthers from the flower and dusted the pistil with pollen from the plant he wished to cross it with and covered the flower with a small bag to prevent the pollen in the air from landing in the pistil. This process is called cross pollination.
Mendel considered 7 characters of pea plant for his study and did the study for several generations.
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