Lecture 21

Question 1

Batesian mimicry:

Answer 1

• Species A (the mimic) is palatable and unprotected (so is eliminated quickly by predators)
• Species B (the model) is unpalatable
• Species A will try to evolve to resemble a well-protected model in the same region.
• Predators avoiding B will also avoid A
• Species B will evolve away, and species A will continue evolving to catch up

Question 2

How can species A mimic species B?

Answer 2

-

Question 3

Metalmark moths mimic their jumping spider predator, how?

Answer 3

• The appearance

- The behavior

Question 4

Mimicry in Heliconius butterflies:

Answer 4

• There is a range of phenotypes in each species

- This is due to variation in the P locus of a gene. This gene is LG15

Question 5

How was this studied?

Answer 5

• The phenotypes were defined
• Crosses/broods/pedigrees were set up
• Molecular markers were developed
• Developed gene markers (anchor loci)
• Physical and comparative mapping followed

Question 6

Chromosomal inversions were discovered after:

Answer 6

Genetic mapping, physical mapping and connecting these.