Sexual Reproduction (pg310)
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Today we studied the other kind of reproduction… the awkward kind of reproduction… sexual reproduction. We defined it as “a type of reproduction by which offspring arise from two parent organisms; each parent creates a sex cell with mixed copy of each chromosome, then the cells are combined to form a brand new organism.” We started by discussing the human example (without too much detail!) and then students moved on to researching other examples. These included dragonflies, flowers, and even the gastric brooding frog. A copy of the worksheet is posted above.
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to see state-specific standards (only available in the US).
Develop and use a model to describe why structural changes to genes (mutations) located on chromosomes may affect proteins and may result in harmful, beneficial, or neutral effects to the structure and function of the organism. Emphasis is on conceptual understanding that changes in genetic material may result in making different proteins. Assessment does not include specific changes at the molecular level, mechanisms for protein synthesis, or specific types of mutations.
Develop and use a model to describe why asexual reproduction results in offspring with identical genetic information and sexual reproduction results in offspring with genetic variation. Emphasis is on using models such as Punnett squares, diagrams, and simulations to describe the cause and effect relationship of gene transmission from parent(s) to offspring and resulting genetic variation.