Question

round seeds are dominant to wrikled seeds. RR, Rr, rr

Answer 1

In genetics, the traits you mentioned (round seeds and wrinkled seeds) are typically studied using Mendelian inheritance. In this case, "R" represents the dominant allele for round seeds, and "r" represents the recessive allele for wrinkled seeds.

- **RR**: Homozygous dominant genotype, resulting in round seeds.
- **Rr**: Heterozygous genotype, also resulting in round seeds (because R is dominant).
- **rr**: Homozygous recessive genotype, resulting in wrinkled seeds.

When conducting a Punnett square for a cross between two organisms, you can predict the offspring's genotypes and phenotypes.

If you cross two heterozygous individuals (Rr × Rr), the Punnett square would look like this:

```
R r
------------
R | RR | Rr |
------------
r | Rr | rr |
------------
```

From this cross, the expected genotypic ratio would be:

- 1 RR: 2 Rr: 1 rr

And the phenotypic ratio (considering that both RR and Rr genotypes show the round seed phenotype) would be:

- 3 round seeds: 1 wrinkled seed

If you have a different cross in mind or need assistance with specific scenarios, please let me know!