Problem

Solutions For An Introduction to Genetic Analysis Chapter 4 Problem 58P

Step-by-Step Solution

Solution 1

In the three-point test cross the progeny with highest, or most prominent number should be considered as Parental (P), whereas the progeny with the lowest, or less number progeny should be considered as double crossovers (DCO). The given data set is as follows:

$C:\Users\rajesh.r\Desktop\Untitled.jpg$

Data set-1: The parental (P) and recombinant (SCO+DCO) for data set-1 are as follows:

The parental progeny of data set-1 are as follows:

•

The Double crossovers (DCO) are as follows:

•

By comparing the Parental and DCOs it seems gene is exchanged between chromosomes during the crossover event. The double crossover products of data set-1 are as follows:

$C:\Users\rajesh.r\Desktop\1.jpg$

Thus, the gene order of data set-1 is

Step #2 of 7

Data set-2: The parental (P) and recombinant (SCO+DCO) for data set-2 are as follows:

The parental progeny of data set-2 are as follows:

•

Step #3 of 7

The Double crossovers (DCO) are as follows:

•

By comparing the Parental and DCOs it seems gene is exchanged between chromosomes during the crossover event. The double crossover products of data set-2 are as follows:

$C:\Users\rajesh.r\Desktop\2.jpg$

Thus, the gene order of data set-2 is

Step #4 of 7

Data set-3: The parental (P) and recombinant (SCO+DCO) for data set-3 are as follows:

The parental progeny of data set-3 are as follows:

•

The Double crossovers (DCO) are as follows:

•

By comparing the Parental and DCOs it seems gene is exchanged between chromosomes during the crossover event. The double crossover products of data set-3 are as follows:

$C:\Users\rajesh.r\Desktop\3.jpg$

Thus, the gene order of data set-3 is

Step #5 of 7

Data set-4: The parental (P) and recombinant (SCO+DCO) for data set-4 are as follows:

Step #6 of 7

The parental progeny of data set-4 are as follows:

•

The Double crossovers (DCO) are as follows:

•

By comparing the Parental and DCOs it seems gene is exchanged between chromosomes during the crossover event. The double crossover products of data set-4 are as follows:

$C:\Users\rajesh.r\Desktop\4.jpg$

Thus, the gene order of data set-4 is

Step #7 of 7

Data set-5: The parental (P) and recombinant (SCO+DCO) for data set-5 are as follows:

The parental progeny of data set-5 are as follows:

•

The Double crossovers (DCO) are as follows:

•

By comparing the Parental and DCOs it seems gene is exchanged between chromosomes during the crossover event. The double crossover products of data set-5 are as follows: