Choose the correct statement about recombination and linkage

1. Complete linkage results in higher non-parental gene combinations than parental type

2. Recombination results in the generation of parental gene combinations

3. Genetic maps are constructed by using the frequency of recombination between gene pairs

4. T.H. Morgan constructed the first chromosome map

Today ________ are extensively used as a _______ point in the sequencing of whole genome

(1) Pedigree charts, conclusive

(2) Genetic maps, starting

(3) Pedigree charts, starting

(4) Genetic maps, conclusive

The frequency of recombination between gene pairs on the same chromosome as a measure of the distance between genes was explained by: