Observe the given diagram of a genetic cross and match the labels (P, Q, R, S) in List I with their correct genetic terms or values in List II. List I List II A Process P 1 Heterozygous B Genotype Q 2 1:1 C Genotype R 3 Homozygous recessive D Ratio S 4 Test cross Choose the correct answer from the options given below:

Step-by-step solution

In the given cross, a violet flower (dominant phenotype) is crossed with a white flower (recessive phenotype). Since the offspring are produced in a 50 % : 50 % ratio of violet to white flowers, this indicates a test cross. Thus, Process P is a test cross (A 4). For a test cross to yield a 1:1 ratio, the dominant parent must be heterozygous. Therefore, Genotype Q is heterozygous (B 1). The white flower parent expresses the recessive trait, so its genotype must be homozygous recessive. Thus, Genotype R is homozygous