Question

1. set up a punnett square using the following information:○ dominant allele for tall plants = d○ recessive allele for dwarf plants = d○ dominant allele for purple flowers = w○ recessive allele for white flowers = w○ cross a homozygous dominant parent (ddww) with a homozygous recessive parent (ddww).i. what is the probability of producing tall plants with purple flowers?possible genotype(s)?ii. what is the probability of producing dwarf plants with white flowers?possible genotype(s)?iii. what is the probability of producing tall plants with white flowers?possible genotype(s)?iv. what is the probability of producing dwarf plants with purple flowers?possible genotype(s)?

Explanation:

Step1: Identify gamete genotypes

Homozygous dominant (DDWW) only produces $DW$ gametes. Homozygous recessive (ddww) only produces $dw$ gametes.

Step2: Set up Punnett Square

	$DW$

All offspring have the genotype $DdWw$.

Step3: Match traits to genotypes

• Tall (D_) + purple (W_) = $DdWw$ (dominant alleles expressed)
• Dwarf (dd) + white (ww) = no matching genotypes
• Tall (D_) + white (ww) = no matching genotypes
• Dwarf (dd) + purple (W_) = no matching genotypes

Step4: Calculate probabilities

Probability = $\frac{\text{Number of matching offspring}}{\text{Total offspring}}$

Answer:

i. Probability: $1$ or 100%; Possible genotype(s): $DdWw$
ii. Probability: $0$ or 0%; Possible genotype(s): None
iii. Probability: $0$ or 0%; Possible genotype(s): None
iv. Probability: $0$ or 0%; Possible genotype(s): None

Completed Punnett Square:

	$DW$