Lecture 20 Flashcards
(7 cards)
1
Q
what do regulatory switches provide?
A
- provide flexibility
- do not change the structure of genes
2
Q
what is incomplete lineage sorting?
A
- when gene tree does not match phylogeny
- when selection on the gene is different from selection on the entire genome is possible explanation for the presence of incomplete lineage sorting
3
Q
can incomplete lineage sorting occur with an allele that arose recently?
A
no, incomplete lineage can only occur for a trait that’s been around for a while
4
Q
what is antagonistic pleiotropy?
A
a muration or gene with beneficial effects for one trait also causes detrimental effects on the other trait
5
Q
what is pleiotropy?
A
genes that influence one trait may also influence another trait
6
Q
how can antagonistic pleiotropy constrain evolution?
A
can cause some phenotypes to be unsuccessful even when mutations may be beneficial
7
Q
what is the term people use to describe the cost to resistance?
A
antagonistic pleiotropy
