Selective Breeding in Plants and Animals Flashcards
(12 cards)
what does selective breeding mean
means to breed selected individuals with desired characteristics together
does selective breeding happen over generations
yes until a new breed with the desired characteristics if formed
what characteristics are plants bred for (5)
- disease resistance in crops
- increased crop yield
- tolerance to weather conditions
- better tasting fruits
- large or unusual flowers
problems with selective breeding in plants : (3/)
can lead to inbreeding
results in reduction of gene pool so more chance of :
- organism inheriting harmful genetic defects
- organisms being vulnerable to new diseases
how does selective breeding happen
- individuals with selected characteristics are bred together
- offspring which show desired characteristics are selected and bred together
- process is repeated fro many generations
in animals, there is 2 types
natural selection and artificial selection
natural selection happens
naturally
natural selection results in
the development of a population better adapted for survival
natural selection happens over a long or short period
long
artificial selection happens when
ONLY when humans intervene
artificial selection results in
the development of a population with characteristics which are useful to humans, not for the survival of the individual
does artificial selection take a long time
takes less time than natural selection
