Artificial Selection Essay
CHAPTER 7, SECTION 7.2 PAGES 305 – 310
Natural selection: A process in which results in the characteristics of a population of organisms change over many generations. It occurs because individuals with certain inherited traits survive specific local environmental conditions and through reproduction, pass on their alleles to their offspring.
Selective Pressure: environmental conditions that select for certain characteristics of an individual and select against other characteristics
It may result from biotic factors as well, such as predators, parasites and competition for resources.
Example: population in Staphylococcus aureus, the individual members of the bacteria were selected by their environment.
They were able to survive the …show more content…
The contribution to the gene pool of the next generation by producing offspring’s that survive long enough to reproduce
Described by the number of reproductively viable offspring’s that an organism produces in the next generation
Artificial Selection
Type of selective breeding
Artificial selection: exerted by humans on a population by modify or improving particular desirable traits
Biotechnology: the use of technology & organisms to produce useful products
Artificial selection, huge impact on HUMAN SURVIVAL
Most of our food comes from artificial selection
Artificial selection resulted in cows that produce more milk
Chicken are bred to grow quickly and increased amounts of meat
Appearance of cats& dogs
KEY DIFFERENCE BETWEEN ARTIFICAL SELECTION& NATURAL SELECTION
1. Natural selection, environmental conditions plays a key role just like how in artificial selection humans play key role.
2. Natural selection, environmental conditions determine the ability for organisms in a population to survive and reproduce in the current conditions.
3. Biotechnology is used in artificial selection, which is the usage of technology and organisms to produce useful products
Artificial Selection and Food …show more content…
Mutations are the starting point of genetic variation in populations
Mutations Can Provide a Selective Advantage
Selective advantage – a genetic advantage of one organism over its competitors
Causes organisms to be favorable in terms of survival and reproduction
Helps organism survive the changing environmental conditions and reproduce
Water flea Daphnia before can only live in water around 20 and cannot survive 27 or warmer. However due to mutations it enabled the population of DAPHINA to survive in temperatures between 25 and 30.
Rapid Reproduction and Selective Advantage
Some populations of bacteria can double within 10 mins
In populations that reproduce quickly, a new allele that resulted from random mutation that was previously insignificant in the population may provide a selection advantage to some individuals when the environment changes
As a result, individuals that survive long enough will be able to reproduce offspring’s that have the new allele and will pass on to the next generation
One mutation can, in some cases mean the survival of the whole
Natural selection: A process in which results in the characteristics of a population of organisms change over many generations. It occurs because individuals with certain inherited traits survive specific local environmental conditions and through reproduction, pass on their alleles to their offspring.
Selective Pressure: environmental conditions that select for certain characteristics of an individual and select against other characteristics
It may result from biotic factors as well, such as predators, parasites and competition for resources.
Example: population in Staphylococcus aureus, the individual members of the bacteria were selected by their environment.
They were able to survive the …show more content…
The contribution to the gene pool of the next generation by producing offspring’s that survive long enough to reproduce
Described by the number of reproductively viable offspring’s that an organism produces in the next generation
Artificial Selection
Type of selective breeding
Artificial selection: exerted by humans on a population by modify or improving particular desirable traits
Biotechnology: the use of technology & organisms to produce useful products
Artificial selection, huge impact on HUMAN SURVIVAL
Most of our food comes from artificial selection
Artificial selection resulted in cows that produce more milk
Chicken are bred to grow quickly and increased amounts of meat
Appearance of cats& dogs
KEY DIFFERENCE BETWEEN ARTIFICAL SELECTION& NATURAL SELECTION
1. Natural selection, environmental conditions plays a key role just like how in artificial selection humans play key role.
2. Natural selection, environmental conditions determine the ability for organisms in a population to survive and reproduce in the current conditions.
3. Biotechnology is used in artificial selection, which is the usage of technology and organisms to produce useful products
Artificial Selection and Food …show more content…
Mutations are the starting point of genetic variation in populations
Mutations Can Provide a Selective Advantage
Selective advantage – a genetic advantage of one organism over its competitors
Causes organisms to be favorable in terms of survival and reproduction
Helps organism survive the changing environmental conditions and reproduce
Water flea Daphnia before can only live in water around 20 and cannot survive 27 or warmer. However due to mutations it enabled the population of DAPHINA to survive in temperatures between 25 and 30.
Rapid Reproduction and Selective Advantage
Some populations of bacteria can double within 10 mins
In populations that reproduce quickly, a new allele that resulted from random mutation that was previously insignificant in the population may provide a selection advantage to some individuals when the environment changes
As a result, individuals that survive long enough will be able to reproduce offspring’s that have the new allele and will pass on to the next generation
One mutation can, in some cases mean the survival of the whole