Beak color: y for yellow beak (yy and yy) and y for black beak (yy)< br />
tail-feather length: l for long tail (ll and ll) and l for short tail (ll)
feather color: b for blue feathers (bb and bb) and b for white feathers (bb)< br />
part 1: crossing beak color and tail-feather length< br />
cross a yyll (heterozygous parent with dominant traits) with yyll (homozygous parent with recessive traits). look at the number of phenotypes of the f1 generation: < br />
yyll: 400< br />
yyll: 100< br />
yyll: 100 < br />
yyll: 400< br />
2. how far apart are y and l? give your answer in map units. (hint: add the numbers of the two recombinant types, divide by the total number of offspring, and multiply by 100.)< br />