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Grade 7 · unit review

Review: Reproduction, Inheritance and Development

Connect reproduction to genetic information without reducing all traits to one gene.

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Bring the unit skills together

Use these 4 new cases to check your reasoning. Choices are temporary and are not saved to an account, sent to staff or recorded as school grades. Download your current review choices before leaving or reloading.

Unit review questions
1. Which reproduction-model or cell category is specifically described? Supplied case: Bacterial division without gamete fusion.
Need a hint?
  • Look for the described feature: offspring produced without gamete fusion.
  • Compare the given mechanism with the other labels; do not infer unmentioned events.
2. Which scientific label fits the specifically described step or feature? Supplied case: Sequence written with DNA bases.
Need a hint?
  • Look for the described feature: sequence-bearing genetic molecule.
  • Compare the given mechanism with the other labels; do not infer unmentioned events.
3. Supplied case 5: first gamete chromosomes=14; second gamete chromosomes=14, using the explicitly named quantities. Zygote chromosome count equals the two supplied gamete counts added. What result follows?
Need a hint?
  • Zygote chromosome count equals the two supplied gamete counts added.
  • Counts are specific to the supplied fictional species.
4. Which scientific label fits the specifically described step or feature? Supplied case: Temperature changes supplied development timing.
Need a hint?
  • Look for the described feature: conditions affect development.
  • Compare the given mechanism with the other labels; do not infer unmentioned events.

The download contains your current choices and any checked feedback. Keep the separate transfer-task work in your own document; downloading its instructions does not mark it complete.

Use the skills in a new task

Create a four-panel explanation for “Reproduction, Inheritance and Development” using one supplied case from each lesson. Include the observation, scientific mechanism or calculation, result and a limitation. You may draw and speak your explanation; all inputs are supplied.

Work on paper or in your own document. Explain the choices you made.

  • Use one supplied case from each of the four lessons.
  • Name the relevant structure, quantity or process in every panel.
  • Show calculations with units or a causal evidence chain.
  • Distinguish source facts from fictional classroom data.
  • State a model limit or a condition that would change the result.
Compare with a model response

Panel 1: A model organism buds without gamete fusion. What explains the reproductive pathway? Which inference or prediction is best supported? Result: Offspring formation does not require two gametes in this asexual model.. Reasoning: The supplied mechanism lacks fusion; variation and species scope remain separate questions. Model limitation: only the stated classroom boundary and supplied observations are established; unmeasured real-world performance remains unverified. Panel 2: A DNA sequence region changes while its chromosome remains present. What distinction matters? Which inference or prediction is best supported? Result: A gene-region change can occur within a larger chromosome.. Reasoning: Functional DNA regions and organized DNA-containing structures have different scope. Model limitation: only the stated classroom boundary and supplied observations are established; unmeasured real-world performance remains unverified. Panel 3: Supplied case 1: first gamete chromosomes=6; second gamete chromosomes=6, using the explicitly named quantities. Zygote chromosome count equals the two supplied gamete counts added. What result follows? Result: 12 chromosomes. Reasoning: Substitute the supplied values: (6)+(6) = 12 chromosomes. Add one count from each gamete. Fertilization differs from ordinary cell division. Model limitation: only the stated classroom boundary and supplied observations are established; unmeasured real-world performance remains unverified. Panel 4: A pigment variant has different observed effects under two supplied temperatures. What follows? Which inference or prediction is best supported? Result: The gene’s measured effect depends on environmental context in this model.. Reasoning: Genetic and environmental influences can interact; the two conditions support only a bounded comparison. Model limitation: only the stated classroom boundary and supplied observations are established; unmeasured real-world performance remains unverified.

A different response can also meet the criteria. Compare the evidence and reasoning, rather than copying the wording.