In a test cross involving $F_1$ dihybrid flies, more parentaltype offspring were produced than the recombinanttype offspring. This indicates
the two genes are linked and present on the same chromosome
both of the characters are controlled by more than one gene
the two genes are located on two different chromosomes
chromosomes failed to separate during meiosis.
The four daughter cells derived from a single meiosis differ from each other due to
The word 'crossing over' is given by
Who used the frequency of recombination ?
Definitions / Explanation : Linkage
Which one of the following pair is correctly matched