Transcript 2 Dragonfly antennae shape and body colour

Investigation of
Dragonfly antennae
shape and body colour
Hypothesis: Allele for Bent
antennae shape and brown
body colour are dominant,
no gene interaction
Author: Joy Tao & Reef Koh
To investigate if:
Crossed:
Result:
Conclusion:
Brown X Brown
Brown (3) : Yellow (1)
[p = 0.32]
Suggest that yellow is
recessive
Yellow X Yellow
All yellow
Conclude that yellow is
recessive
pointy is recessive
Pointy X Pointy
5 crosses where all were pointy
1 cross with pointy (3) : bent (1)
Pointy is dominant
bent is recessive
Bent X Bent
All bent
Bent is recessive
there is any gene
interaction
Pointy Brown X
Pointy Brown
PB (1131) : PY (377) : BB (383) : BY (109)
[p = 0.52]
No interaction between
genes
brown is dominant
yellow is recessive
Conclusion: Allele for pointy antennae shape and brown body colour are
dominant, no gene interaction