What is a genetic map?

Select the correct statement regarding dihybrid crosses and linkage.

In diploid organisms,crossing over is responsible for which of the following?

The evidence that crossing over occurs at the four-stranded stage and not at the two-stranded stage of the chromosomes comes from:

There are three genes $a, b,$ and $c$. The recombination frequency between $a$ and $b$ is $20\%$,between $b$ and $c$ is $28\%$,and between $a$ and $c$ is $8\%$. What is the possible arrangement of these genes on the chromosome?

Genes $A$ and $B$ are linked. What will be the genotype of the offspring produced by a cross between $AB/ab$ and $ab/ab$?