Question

1. Flower color in a particular plant is controlled by two independently assorting genes, each with two alleles. The synthesis of flower pigment is a two-step process catalyzed by two different enzymes, each controlled by a different gene: enzyme A enzyme B white precursor ------------------> purple intermediate ------------------> red product The dominant A allele codes for the normal form of enzyme A and the dominant B allele codes for the normal form of enzyme B. Each recessive allele (a and b) produces a nonfunctional form of the respective enzyme. The above pathway is the only source of the purple and red pigments. In the P generation, an AAbb female (purple color) is crossed with an aaBB male plant (white color). The red colored F1 progeny (AaBb) are self-fertilized to produce the F2 generation, in which the following phenotypes were observed (shown in the table below). 1a. Using this information, calculate the chi-square value? __ 1b. Is the data deviation significant? Make sure you label your answer (e.g. 1. answer, 2. answer); otherwise, there will be no credit. F2 Phenotypes Observed # Expected #

          1. Flower color in a particular plant is controlled by two independently assorting genes, each with two alleles. The synthesis of flower pigment is a two-step process catalyzed by two different enzymes, each controlled by a different gene:
enzyme A enzyme B
white precursor ------------------> purple intermediate ------------------> red product
The dominant A allele codes for the normal form of enzyme A and the dominant B allele codes for the normal form of enzyme B. Each recessive allele (a and b) produces a nonfunctional form of the respective enzyme. The above pathway is the only source of the purple and red pigments.
In the P generation, an AAbb female (purple color) is crossed with an aaBB male plant (white color). The red colored F1 progeny (AaBb) are self-fertilized to produce the F2 generation, in which the following phenotypes were observed (shown in the table below).
1a. Using this information, calculate the chi-square value? __
1b. Is the data deviation significant?
Make sure you label your answer (e.g. 1. answer, 2. answer); otherwise, there will be no credit.
F2 Phenotypes Observed # Expected #

1. Flower color in a particular plant is controlled by two independently assorting genes, each with two alleles. The synthesis of flower pigment is a two-step process catalyzed by two different enzymes, each controlled by a different gene:
enzyme A enzyme B
white precursor ——————> purple intermediate ——————> red product
The dominant A allele codes for the normal form of enzyme A and the dominant B allele codes for the normal form of enzyme B. Each recessive allele (a and b) produces a nonfunctional form of the respective enzyme. The above pathway is the only source of the purple and red pigments.
In the P generation, an AAbb female (purple color) is crossed with an aaBB male plant (white color). The red colored F1 progeny (AaBb) are self-fertilized to produce the F2 generation, in which the following phenotypes were observed (shown in the table below).
1a. Using this information, calculate the chi-square value?
1b. Is the data deviation significant?
Make sure you label your answer (e.g. 1. answer, 2. answer); otherwise, there will be no credit.
F2 Phenotypes Observed # Expected #

Added by Raul P.

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