resulting in more organisms with desired characteristics
characteristics
selective breeding is also known as
artificial selection
so once again here's the process of
selective breeding selection by humans
of individuals with desirable features
Crossing these individuals to produce
the Next Generation
selection of Offspring showing the
selective breeding also known as
artificial selection is a method used
over multiple generations to enhance
desirable traits in crop plants and
domesticated animals
humans selectively breed plants to
enhance various traits such as disease
resistance in food crops
increased crop yield
adaptation to challenging with the
conditions example drought tolerance
Improvement in taste and flavor of fruits
fruits
cultivation of plants with large or
so for example say we want to
selectively breed crops to increase
their disease resistance first we have
to identify plants that display
resistance to specific diseases then
cross breed these resistant plants to
produce the Next Generation next select
Offspring with increased disease resistance
resistance
continue the cycle of breeding and
selecting for disease resistance to
develop new varieties that are more
resilient to diseases
humans selectively breed animals by
choosing individuals with desired traits
and breeding them together over multiple
Generations until a new breed with
consistent desired characteristics is
established animals are selectively bred
by humans to develop specific traits
such as cows goats and sheep that
produce lots of milk or meat
domestic dogs with a gentle nature
sheep with good quality wool
horses with fine features and great speed
speed
so for example if we want to selectively
breed sheep for better quality wool
identify sheep with good quality wool
breed these sheep to produce the Next
Generation select Offspring with
improved wool quality repeat the
breeding and selection process to
gradually enhance the wool quality in
finally let's compare the differences
between natural and artificial selection
natural selection occurs naturally
without human intervention while
artificial selection occurs with human
natural selection results in adaptations
that enhance survival and reproduction
in a specific environment so it's driven
by survival advantages
artificial selection often focuses on
traits that are advantageous or
desirable from a human perspective so
it's driven by human preferences and goals
goals
natural selection can lead to the
gradual change and diversification of
species over time so it usually takes a
long time to occur and artificial
selection can result in rapid changes in
traits within a population over a
relatively short period so it takes less time
so that concludes part 2 of chapter 18
variation and selection
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