When a crossover occurs the entire portion of genetic material is swapped between the two homologous chromosomes, so gene C is swapped along with gene B and gene R is swapped along with gene L. C. Click Reset. Create a cBLr gamete. How many crossovers were needed? __

## Step 1<br />The problem is about genetic crossover, a process that occurs during meiosis, a type of cell division. In this process, homologous chromosomes exchange segments of DNA. This is a crucial mechanism in sexual reproduction, as it increases genetic diversity.<br /><br />## Step 2<br />The problem states that gene C is swapped along with gene B, and gene R is swapped along with gene L. This implies that there are two separate crossover events. <br /><br />## Step 3<br />The first crossover event involves the swapping of gene C with gene B. This is a crossover between two genes on the same chromosome.<br /><br />## Step 4<br />The second crossover event involves the swapping of gene R with gene L. This is another crossover between two genes on the same chromosome.<br /><br />## Step 5<br />Therefore, two crossovers were needed to create the cBLr gamete as described in the problem.