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Problem: Flower colour in a plant species is determined by two genes, gene B and gene P. The gene products of these genes are enzymes that convert a white substrate to an intermediate blue substrate and then to the final purple product.This series of conversions are shown in a simplified pathway below.A. What is the phenotype of the following genotypes (white, blue, or purple)     1. BbPp     2. BBpp     3. bbPP     4. bbppB. If you cross two dihybrids together, what proportion of the progeny will be:     1. white              2. blue              3. PurpleC. If you test cross a dihybrid, what proportion of the progeny will be:     1. white              2. blue              3. Purple

FREE Expert Solution

From the given problem, it can be seen that the dominant character of the B allele gives color to the flowers. In addition to this, the dominant character of the P allele modifies the default blue color to purple. Thus, a recessive p allele will simply leave the flower color to blue while a recessive B allele will leave it as plain white, despite the presence of a dominant P.

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Problem Details

Flower colour in a plant species is determined by two genes, gene B and gene P. The gene products of these genes are enzymes that convert a white substrate to an intermediate blue substrate and then to the final purple product.

This series of conversions are shown in a simplified pathway below.

A. What is the phenotype of the following genotypes (white, blue, or purple)

     1. BbPp

     2. BBpp

     3. bbPP

     4. bbpp

B. If you cross two dihybrids together, what proportion of the progeny will be:

     1. white              2. blue              3. Purple

C. If you test cross a dihybrid, what proportion of the progeny will be:

     1. white              2. blue              3. Purple


Frequently Asked Questions

What scientific concept do you need to know in order to solve this problem?

Our tutors have indicated that to solve this problem you will need to apply the Extensions to Mendel concept. You can view video lessons to learn Extensions to Mendel. Or if you need more Extensions to Mendel practice, you can also practice Extensions to Mendel practice problems.

What professor is this problem relevant for?

Based on our data, we think this problem is relevant for Professor McCleary's class at USF.