Answer:
3/4
Explanation:
This question involves a single gene coding for flower color in cactus plant. The allele for red flowers (R) are dominant over the allele for white flowers (r). This means that a cactus that is heterozygous (Rr) for the Gene will possess a red phenotype.
In this cross, two heterozygous cacti are crossed. The following gametes will be produced by each heterozygous parent: R and r. Using these gametes in a punnet square, the following genotype of offsprings will be produced;
RR, Rr, Rr, and rr
RR, Rr and Rr are Red flowers (3/4)
rr are white flowers (1/4)
Therefore, the probability of having offspring with red flowers is 3/4.
