3) Consequences in genotype due to domestication Flashcards
1
Q
Briefly list the consequences in genotype due to domestication
A
- Chromosome number may change
- mtDNA sequences remain nearly constant during development
- Genetic pollution
- Application of Haldane’s rule
2
Q
Describe the change in chromosome number in domestication
A
Dependent on different habitats
3
Q
Wild + domesticated hybrids will produce…
A
Individuals with an intermediate number of chromosomes
4
Q
How often do mtDNA sequences mutate?
A
Approximately every 2000 years
(evidence for microevolution)
5
Q
Haldane’s rule
A
- When one sex is absent/sterile in offspring of two different species (heterogametic sex)
- Males in mammals
- Applies to mammals, birds + insects
6
Q
Genetic pollution
A
Fertile hybrids between:
- feral/domesticated
- wild animals
7
Q
Consequences of genetic pollution
A
May be an extinction threat as a ‘pure’ ancestor can’t be found
8
Q
Genetic pollution risks which animals?
A
- Mallard duck
- Wild boar
- Red jungle fowl
- Carp
- Salmon
- Dingo
