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Science and Technology/Engineering > Grade 8 > Life Science
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Science and Technology/Engineering | Grade : 8

Discipline - Life Science

Core Idea - Heredity: Inheritance and Variation of Traits

[8.LS.3.4] - Develop and use a model to show that sexually reproducing organisms have two of each chromosome in their cell nuclei, and hence two variants (alleles) of each gene that can be the same or different from each other, with one random assortment of each chromosome passed down to offspring from both parents. Clarification Statement: Examples of models can include Punnett squares, diagrams (e.g., simple pedigrees), and simulations. State Assessment Boundary: State assessment will limit inheritance patterns to dominant-recessive alleles only.

Resources:

Predecessor Standards:

  • 7.SP.C.8
    Find probabilities of compound events using organized lists, tables, tree diagrams, and simulation.

Successor Standards:

No Successor Standards found.

Same Level Standards:

  • RCA-ST.6-8.7
    Integrate quantitative or technical information expressed in words in a text with a version of that information expressed visually (e.g., in a flowchart, diagram, model, graph, or table).
  • 8.LS.3.2
    Construct an argument based on evidence for how asexual reproduction results in offspring with identical genetic information and sexual reproduction results in offspring with genetic variation. Compare and contrast advantages and disadvantages of asexual and sexual reproduction. Clarification Statements: Examples of an advantage of sexual reproduction can include genetic variation when the environment changes or a disease is introduced, while examples of an advantage of asexual reproduction can include not using energy to find a mate and fast reproduction rates. Examples of a disadvantage of sexual reproduction can include using resources to find a mate, while a disadvantage in asexual reproduction can be the lack of genetic variation when the environment changes or a disease is introduced.
  • 8.LS.3.3
    Communicate through writing and in diagrams that chromosomes contain many distinct genes and that each gene holds the instructions for the production of specific proteins, which in turn affects the traits of an individual. State Assessment Boundary: Specific changes at the molecular level or mechanisms for protein synthesis are not expected in state assessment.