Individuals homozygous for cd genes were crossed with wild type ++ . The F1 dihybrid thus produced was test crossed. It produced progeny in the following ratio - ++ 900, + d115 cd 880, c + 105. What is the distance between c and d genes?
To determine the distance between the c and d genes, we need to analyze the progeny resulting from the test cross.
In the F1 generation, individuals homozygous for the cd genes were crossed with wild type ++ individuals. This suggests that the genotype of the F1 dihybrid is cd/++.
Now let's break down the progeny resulting from the test cross:
- ++: 900
- + d cd: 880
- c +: 105
From the given progeny numbers, we can conclude that the c and d genes are segregating independently, meaning their inheritance is not linked. This suggests that the c and d genes are on different chromosomes or are located far apart on the same chromosome.
Based on the given information, we cannot directly determine the distance between the c and d genes. To calculate the distance between them, we would need additional data related to the frequency of recombinant offspring.