Lecture 16 Flashcards
How can sexual dimorphisms differ
They can differ in secondary characterisitcs
They can differ in reproductive traits
Physiology
Example of sexual dimorphisms
Body size and colour in guppies.
Females have large size and are colour
Males are medium size and less colourful
Whats intra locus conflict
When trait has shared genetic basis between the sexes and contradictary selection pressures act on sexes
Whats inter-locus conflict
Arises when a trait in one sex interacts with a different trait in another sex
What does intralocus conflict act as
An evolutionary break and promotes genetic diversity within populations
What does concordant mean
Operates in the same direction
What does sexually antagonistic selection mean
The selection pressure differs in males and females
Example of interlocus conflict
Sex peptide protein is expressed by males and transferred to females in mating interactions reducing female receptivity
Why do we know less about intralocus conflict
Evolutionary arms races are harder to predict the outcome of
What are the two main routes which conflict can be resolved
Sex chromosomes and gene expression on autosomes
