selective breeding Flashcards
1
Q
what do humans selectively breed?
A
- Disease resistance in food crops
- Animals which produce more meat or milk
- Domestic dogs with a gentle nature
- Large or unusual flowers
2
Q
selective breeding
A
the process by which humans breed plants and animals for particular genetic characteristics
3
Q
process of selective breeding
A
- choose parents with desired characteristics from a mixed population
- they are bred together
- offspring with desired characteristics are bred together
- continues over many generations until all offspring show desired characteristics
4
Q
what type of variation can be passed on?
A
- genetic
5
Q
What effect does selective breeding usually have on variation within a population?
A
decreases variation
6
Q
drawbacks of inbreeding
A
- reduces size of gene pool, different alleles
- population at a higher risk of disease
- higher chances of rare inherited disease
7
Q
inbreeding
A
breeding from closely related species
