GENETIC DIVERSITY
Standard: MS-LS4-4: Construct an explanation based on evidence that describes how genetic variations of traits in a population increase some individuals’ probability of surviving and reproducing in a specific environment. [Clarification Statement: Emphasis is on using simple probability statements and proportional reasoning to construct explanations.]
Spirit Bear Video Clips
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BOTTLENECK GENE LAB
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Evidence Statements and Reasoning
Evidence may include:
i. Individuals in a species have genetic variation that can be passed on to their offspring.
ii. what are the chances (probability) of a specific organism surviving and reproducing in a specific environment.
iii. The traits (i.e., specific variations of a characteristic) and the cause-and-effect relationships between those traits and the
probability of survival and reproduction of a given organism in a specific environment.
iv. The particular genetic variations (associated with those traits) that are carried by that organism.
Reasoning includes:
i. Any population in a given environment contains a variety of available, inheritable genetic traits.
ii. For a specific environment (e.g., different environments may have limited food availability, predators, nesting site availability,
light availability), some traits confer advantages that make it more probable that an organism will be able to survive and
reproduce there.
iii. In a population, there is a cause-and-effect relationship between the variation of traits and the probability that specific
organisms will be able to survive and reproduce.
iv. Variation of traits is a result of genetic variations occurring in the population.
v. The proportion of individual organisms that have genetic variations and traits that are advantageous in a particular
environment will increase from generation to generation due to natural selection because the probability that those
individuals will survive and reproduce is greater.
i. Individuals in a species have genetic variation that can be passed on to their offspring.
ii. what are the chances (probability) of a specific organism surviving and reproducing in a specific environment.
iii. The traits (i.e., specific variations of a characteristic) and the cause-and-effect relationships between those traits and the
probability of survival and reproduction of a given organism in a specific environment.
iv. The particular genetic variations (associated with those traits) that are carried by that organism.
Reasoning includes:
i. Any population in a given environment contains a variety of available, inheritable genetic traits.
ii. For a specific environment (e.g., different environments may have limited food availability, predators, nesting site availability,
light availability), some traits confer advantages that make it more probable that an organism will be able to survive and
reproduce there.
iii. In a population, there is a cause-and-effect relationship between the variation of traits and the probability that specific
organisms will be able to survive and reproduce.
iv. Variation of traits is a result of genetic variations occurring in the population.
v. The proportion of individual organisms that have genetic variations and traits that are advantageous in a particular
environment will increase from generation to generation due to natural selection because the probability that those
individuals will survive and reproduce is greater.