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

BB & Bb only is the answer

BB or Bb.

Explanation:

BB & bb

Explanation:

BB ONLY

Explanation:

The genotypes of the black seeds are BB, Bb and Bb

Explanation:

A monohybrid cross are organisms that are heterozygous, in this case (Bb).

The monohybrid plants are both Bb.

If you do a punnet square and cross two Bb x Bb plants you will get the following genotypes:

BB, Bb, Bb and bb

Three black seed plants and 1 brown seed plant (bb)

The brown seed plants have the recessive trait b

While the black seed plant has the dominant trait.

The reason why the plants with the genotype Bb are black is because the dominant allele is B which is the black seed plant.

Therefore, any plant having the dominant allele B will physically have black seeds

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.

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.

Make the brown seeds blue

The black seeds would be dominant to the brown seeds, so the black seeds would be represented as BB (homozygous dominant) and Bb (heterozygous dominant). The brown seeds would be bb (recessive). Hope this helped some :)