4) Consequences in phenotype due to domestication Flashcards
1
Q
Summarise the consequences in phenotype due to domestication
A
- Tameness
- Increases species variety
- Body size + Conformation
- Coat colour + Characteristics
- Biodiversity
- Skeleton
- Neural system
- Digestive system
- Endocrine glands, kidney heart
- Sexual activity
2
Q
Phenotypic changes: Tameness
A
- Aggression + behavioural changes
- Not all species can be tamed
- Some can be more easily tamed than others
3
Q
Phenotypic changes: Increased species variety
A
- Appearance
- Development of new breeds
- Varieties within a species
4
Q
Give an example of increased species variety due to domestication
A
Dog breeding over the years has led to a huge number of breeds within the species
5
Q
Phenotypic changes: Body size + confirmation
A
- Body size + measures
- Weight differences
- Gigantism
- Dwarfism
- Tail length
- Chondrodysplasia
6
Q
Phenotypic changes: Coat colour + characteristics
A
- Pigmentation variations
- Differences in thickness
- Woolly hair, shedding of coat, skin folds, hairlessness, feather colour
7
Q
Phenotypic changes: Biodiversity
A
- High:
- Pigeon
- Dog
- Cattle
- Low:
- Horse
- Sheep
- Turkey
- Guinea fowl
- Quail
8
Q
Phenotypic changes: Skeleton
A
- Body length
- Polled/horned skeleton
- Different degrees of achondroplasia
9
Q
Phenotypic changes: Neural system
A
- A decrease of brain mass
- Fitness + perception abilities
10
Q
Phenotypic changes: Digestive system
A
Alternations in length + effectiveness
11
Q
Phenotypic changes: Endocrine glands, kidney, heart
A
Great variance
12
Q
Phenotypic changes: Sexual activity
A
- Seasonality disappears
- Early puberty + maturity
- Increased sexual activity
- Higher fertility
- More developed sex organs
- Increased productivity
Greatly affected by human interference
