In a species of insect, the gene for body colour (alleles B B\,B for grey, dominant to b b\,b for black) and the gene for wing shape (alleles V V\,V for normal, dominant to v v\,v for vestigial) are autosomally linked.
A heterozygous grey, normal-winged insect (BbVvBbVvBbVv) has the chromosomal arrangement shown below:
This insect was crossed with a homozygous recessive black, vestigial-winged insect (bbvvbbvvbbvv). The phenotypes and numbers of the resulting offspring were:
- Grey, normal: 412
- Black, vestigial: 388
- Grey, vestigial: 104
- Black, normal: 96
What is the recombination frequency between these two gene loci?
10.0%10.0\%10.0%
80.0%80.0\%80.0%
20.0%20.0\%20.0%
50.0%50.0\%50.0%