(a) Dihybrid cross between two garden pea plant one homozygous tall with round seeds and the other with wrinkled seeds was carried.
(i) Write the genotype and phenotype of the `F_(1)` progeny obtained from this cross.
(ii) Give the different types of gametes of the `F_(1)` progeny.
(iii) Write the phenotypes and its ratios of the `F_(2)` generation obtained in this cross along with the explanation provided by Mendel.
(b) How were the observations of `F_(2)` progeny of dihybrid crosses in Philosophical by Morgan different from that of Mendel carried in Pea plants ? Explain giving reasons.

Explanation

### Step-by-Step Solution:

#### (a) Dihybrid Cross of Garden Pea Plants

1. **Identify the Parent Genotypes:**
- One parent is homozygous tall with round seeds: Genotype = **TTRR** (Tall and Round)
- The other parent is homozygous tall with wrinkled seeds: Genotype = **TTRR** (Tall and Wrinkled)

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