In a cross involving a heterozygous red flower plant (Rr) and a white flowered plant (rr). What is the probability that the offspring will be Rr?

In a genetic cross, when we have a heterozygous red flower plant (Rr) and a white flowered plant (rr), we can use a Punnett square to determine the probability of each possible genotype of the offspring.

The parent genotypes are:

• Red flower plant: Rr
• White flower plant: rr

We can set up a Punnett square with the following alleles:

From the table, we can see the following possible outcomes for the offspring:

• Rr (heterozygous red) occurs in 2 out of 4 possible outcomes.
• rr (homozygous white) occurs in 2 out of 4 possible outcomes.

Therefore, the probability that the offspring will be Rr is 2 out of 4 (or 1/2).