Topic 9 Selective breeding Flashcards
What arethe products of artificial selection a result of?
The breeding between selected individuals of a species with features that are percieved as advantageous or beneficial to humans.
Define feral.
Animal now living in the wild, descended from a domesticated species.
Define artificial selection
Selection by humans of a deliberately chosen trait or trait combination in a usually captive population.
What is a breed?
A stock of animals or plants within a species having distinctive or homogenous appearance and/or behaviour and typically having been produced by selective breeding over time.
What is a pedigree?
A recorded lineage of an animal
Why might it be important to identify and preserve wild stocks of otherwise domesticated species?
In order to protect their genetic diversity.
What kind of characters would natural selection continue to act in populations of domesticated animals?
Characters that affect fecundity (breeding success such as:
* Age at sexual maturity
* Litter sizes
* Parental behaviour
Which special form of natural selection could be eliminated entirely under domestication?
Sexual selection
Define inbreeding
Mating between relatives
Define bottlenecks
Population reduction events that result in a reduction of genetic variability
What is inbreeding depression?
Reduced fitness in a population as a result of inbreeding
What is a hybrid?
The offspring of parents from different genetic lines. These may be from within a species, from different species (interspecific hybrid) or different genera (intergeneric hybrid)
