Answer and Explanation:
Punnett squares are diagrams that show the result of crosses of hybrid offspring through genetic breeding. Known parental genotypes and phenotypes are utilized, and they usually align with Mendelian ratios and inheritance. They follow the
- Law of Independent assortment
- and Dominance
For this cross...
- Assuming Purple= dominant
- Assuming White= dominant
- 1. Parent generation or P generation:
gametes: P w → flower color purple dominant (P), white recessive (w)
Assuming heterozygousity
purple × white
- F1 generation: Pw × ww ...(from punnet square)
phenotype: 2 purple; 2 white
∴ all are genotypically heterozygous, 2 purple; 2 white
Assuming true breeding parents (homozygous)
purple × white
- F1 generation: Pw × Pw ...(from punnet square)
phenotype: 4 purple ; 0 white
∴ all are genotypically heterozygous, and purple
2. Parent generation or P generation:
gametes: W p → flower color white dominant (W), purple recessive (p)
Assuming true breeding parents (homozygous)
white × purple
- F1 generation: Wp × Wp ...(from punnet square)
phenotype: 4 white; 0 purple
∴ all are genotypically heterozygous, and white
Assuming heterozygousity
white ; purple
- F1 generation: Wp× pp ...(from punnet square)
phenotype: 2 white; 2 purple
∴ all are genotypically heterozygous, 2 are white and 2 purple
Each punnet cross is attached in order below
