**Transcription and Explanation for Educational Website****Question:**What is the probability of a homozygous recessive offspring for these two parents?**Punnett Square Diagram:**The diagram is a Punnett square used to predict the genetic outcome of a cross between two organisms. It consists of four squares that show the possible genotypes of the offspring.- The alleles from one parent are labeled across the top: `b`, `b`.- The alleles from the other parent are labeled along the side: `B`, `b`.The squares inside the Punnett square are empty, indicating where the combinations of these alleles will be placed to determine the possible genotypes of the offspring. The Punnett Square is designed to account for all combinations of parental alleles.**Answer Choices:**A. 25% B. 50% C. 75% D. 0% **Educational Explanation:**In this genetic cross, the parent genotypes are heterozygous `Bb` and homozygous recessive `bb`. Completing the Punnett square:- Top left: `Bb`- Top right: `Bb`- Bottom left: `bb`- Bottom right: `bb`Therefore, there are two `bb` combinations out of four possible combinations, resulting in a 50% probability of homozygous recessive offspring. The correct answer is B. 50%.

Traits are characteristic features that are unique to particular individual . As per the question , there are two genes for a particular trait . These alleles are :- I ) B :- This gene is dominant . II) b :- This gene is recessive . In the question :- I ) Parent I is homozygous recessive and is represented as genotype bb. II ) Parent II is Heterozygous dominant and is represented as Genotype Bb. Cross between two parents are as :- Gametes b b B Bb Bb b bb bb As per the punnet square , 50% of offspring are Homozygous recessive . Hence , option ( B ) 50% is correct optionOption ( A) is incorrect :- According to punnet square , 50% of offspring are homozygous recessive not 25% . Option ( C ) is incorrect :- As per Punnet square, 50% of offspring are Homozygous recessive. Option ( D ) is incorrect :- When two individuals mate with each other , 50% of offspring are homozygous recessive.Conclusion :- 50% of offspring are homozygous recessive . So , option ( B ) 50% is correct option.