Lecture 19 Flashcards
(4 cards)
1
Q
What are homologous genes?
A
Homologous genes are genes related by descent from a common ancestral DNA sequence.
2
Q
What are paralogs?
A
Paralogs are homologous genes that arise through gene duplication and evolve to have different functions.
3
Q
What are orthologs?
A
Orthologs are homologous genes that arise through speciation and retain the same function.
4
Q
What is a chromosomal island?
A
A chromosomal island is a region of a bacterial chromosome that has been acquired from another bacterium by horizontal gene transfer. Chromosomal islands can contain genes that give the bacterium new abilities, such as the ability to cause disease.
