For the preparation of genetic maps, the recombination frequencies between genes are additive over short distances but not over long distances due to
Multiple cross overs
Lethal mutation
Epistasis
Synaptonemal complex
The term “linkage” was coined by
$A$ : Crossing over is exchange of genetic material between non-homologous chromosomes.
$R$ : It produces new linkages.
The frequency of recombination between gene pairs on the same chromosome as a measure of the distance between genes was explained by
Describe linkage and recombination in detail.
$A$ : Morgan's cross III was conducted in Drosophila to locate genes on chromosome for white eye colour.
$R$ : The cross was done between red eyed hybrid female and white eyed male.