Purpose: To determine patterns of heredity using experimental results from fictitious insects.

Procedure: Study the table below. Show the Genetic Cross for each of the problems. Use the symbols given in each question to diagram each of the crosses using a Punnett Square. Answer the Analysis and Conclusions questions at the end of the lab.

Traits	Possible Phenotypes
Body Color	Blue	White
Eye Color	Green	Brown
Antennae	Long	Short
Bristles	Straight	Curly
Number of Chromosomes	2 Pairs

 

Cross #1	Parents	White-Bodied Male X Blue-Bodied Female
	F1	All Blue-Bodied
	F2	62 Blue-Bodied 21 White-Bodied

 

Cross #2	Parents	Blue-Bodied, Green-Eyed Male X Blue-Bodied, Green-Eyed Female
	F1	21 Blue-Bodied, Green-Eyed 7 White-Bodied, Green-Eyed 8 Blue-Bodied, Brown-Eyed 2 White-Bodied, Brown-Eyed

 

Cross #3	Parents	Blue-Bodied, Short-Antennaed Male X White-Bodied, Long-Antennaed Female
	F1	All Blue-Bodied, Short-Antennaed
	F2	66 Blue-Bodied, Short-Antennaed 19 White-Bodied, Long-Antennaed 1 Blue-Bodied, Long-Antennaed 1 White-Bodied, Short-Antennaed

 

Cross #4	Parents	Curly-Bristled, Green-Eyed Male X Straight-Bristled, Brown-Eyed Female
	F1	All Curly-Bristled, Green-Eyed
	F2	75 Curly-Bristled, Green-Eyed 26 Straight-Bristled, Brown-Eyed 1 Curly-Bristled, Brown-Eyed 2 Straight-Bristled, Green-Eyed

Analysis and Conclusions: