Suppose you have monohybrid flowers in your garden and find that they produce black seeds to brown seeds in the ratio of 3: 1. if the allele are designated (b & b) receptively, what are the probable genotypes of the black seeds produced by your plants? bb & bb bb only bb & bb bb only bb only

Hybrid = having one recessive and one dominant allele
This means that all of the flowers must have the genotype Bb.
Knowing this, let's make a Punnet Square.



As you can see, 3 of these are going to have the dominant trait and 1 is going to have the recessive trait. This corresponds to our 3:1 in our question, meaning that the black seeds must be dominant and the brown ones recessive.

Because they are dominant, the genotype for black seeds could be BB or Bb.

Hydrosphere is the correct answer