Question

Mendel conducted many experiments using pea plants. One of the traits that he looked at was if the flowers were axial (dominant) or terminal (recessive). Mendel always began his experiments by cross pollinating true breeding (homozygous) parents, in this case, true breeding axial with true breeding terminal. In Mendel's F1 generation (the first generation from the original 2 parents), he let the pea plants self-fertilize. Which would represent the genotypes of the F1 individuals that were crossed?
Responses

AA x aa
AA x aa

Aa x Aa
Aa x Aa

AA x Aa
AA x Aa

aa x Aa

Answer 1

In Mendel's experiment with pea plants where he crossed true breeding axial flowers (dominant) with true breeding terminal flowers (recessive), the parental generation can be represented by the genotypes:

- True breeding axial: **AA** (homozygous dominant)
- True breeding terminal: **aa** (homozygous recessive)

Therefore, the F1 generation resulting from the cross of these two true breeding parents would all be **Aa** (heterozygous). When these F1 individuals self-fertilize, they can be crossed as follows:

So, the correct representation of the genotypes of the F1 individuals that were crossed is:

**Aa x Aa**