Question

how did mendel use self - pollination and cross - pollination techniques in his experiments with flower color to observe the basic patterns of inheritance?
by cross - pollinating a parental generation of plants with same - colored flowers and allowing the f₁ generation to self - pollinate, mendel observed the basic patterns of inheritance in the f₂ generation.
by cross - pollinating a parental generation of plants with different - colored flowers and allowing the f₁ generation to self - pollinate, mendel observed the basic patterns of inheritance in the f₂ generation.
by cross - pollinating a parental generation of plants with different colored flowers, mendel was able to observe the basic patterns of inheritance in the f₁ generation.
by allowing a parental generation of plants to self - pollinate and cross - pollinating the f₁ generation, mendel observed the basic patterns of inheritance in the f₂ generation.

Explanation:

Mendel's experiments involved cross - pollinating plants with different traits (in this case, different - colored flowers) in the parental generation (\(P\) generation). The offspring of this cross - pollination is the \(F_1\) generation. Then, he allowed the \(F_1\) generation to self - pollinate. The offspring of the \(F_1\) self - pollination is the \(F_2\) generation. By observing the \(F_2\) generation, he was able to see the patterns of inheritance (such as the reappearance of recessive traits).

• Option 1: Cross - pollinating same - colored flowers is not how Mendel started his experiments to observe inheritance patterns. He used contrasting traits.
• Option 3: The \(F_1\) generation shows only the dominant trait (in a simple dominant - recessive relationship). The basic patterns (including the ratio of dominant to recessive traits in a \(3:1\) ratio for a single - trait cross) are seen in the \(F_2\) generation.
• Option 4: The parental generation was cross - pollinated (not self - pollinated at the start of observing inheritance for the flower color trait).

Answer:

By cross - pollinating a parental generation of plants with different - colored flowers and allowing the \(F_1\) generation to self - pollinate, Mendel observed the basic patterns of inheritance in the \(F_2\) generation.