Please consider the following question:
Genes A and B are located on the same chromosome. If two individuals with the genotype shown below are crossed, which genotype could be formed? Let / represent the line in the image above. a.)AB/ab b.)Ab/Ab c.)aB/aB d.)AB/Ab
Why can't the answer to this question be all of the choices? I thought that recombination was completely randomized through the process of crossing over. Why is only one of the choices correct and how would I go about doing this on my own?