Part B Comparing wildtype and mutant fruit flies Two differ

Part B - Comparing wild-type and mutant fruit flies

Two different Drosophila flies (fruit flies), fly A and fly B, are shown below.

Classify each phrase or term as applying to fly A only, fly B only, or both fly A and fly B.

Drag each phrase or term to the appropriate bin.

possesses mutant
Hox genes

exhibits normal
pattern formation

possesses normal
Hox genes

wild type

exhibits abnormal
pattern formation

produces transcription factors
triggering gene expression for
segment-specific structures

homeotic mutant

1. fly A only

2. fly B only

3. both fly A and fly B

possesses mutant Hox genes exhibits normal pattern formation possesses normal Hox genes wild type exhibits abnormal pattern formation produces transcription factors triggering gene expression for segment-specific structures homeotic mutant 1. fly A only 2. fly B only 3. both fly A and fly B

head thorax abdomen antennae fly A head thorax abdomen legs fly B Adapted from Biology by Campbell and Reece 2008 Pearson Education, Inc.

Solution

Answer:

1. Fly A only: wild type, normal pattern formation, normal Hox genes.

2. Fly B only: abnormal pattern formation, mutant Hox genes, homeotic mutant

3. Both Fly A and B: produces transcription factors triggering gene expression for segment specific structures