Question

1. use the abbreviation r for round peas and r for wrinkled peas in the punnett squares for each question. work out the following crosses and answer the questions. round (rr) x wrinkled (rr) a. what percentage of offspring will be round? b. what percentage of offspring will be wrinkled?

Explanation:

Step1: Determine Gametes

Parent 1 (RR) produces gametes: all R.
Parent 2 (rr) produces gametes: all r.

Step2: Fill Punnett Square

Each cell in the Punnett square (4 cells total) will have genotype Rr (since R from parent 1 and r from parent 2).

Step3: Analyze Phenotypes (a)

Genotype Rr shows the round phenotype (dominant allele R). All 4 offspring are Rr, so percentage of round offspring: $\frac{4}{4} \times 100 = 100\%$.

Step4: Analyze Phenotypes (b)

Wrinkled phenotype requires genotype rr. None of the offspring have rr, so percentage of wrinkled offspring: $\frac{0}{4} \times 100 = 0\%$.

Part (a)

Answer:

100%

Part (b)