RECALLWEAVE / FIELD LAB 01Open the learner ↗

Mendelian inheritance

Follow the alleles.
See the possibilities.

Choose two parents, trace their gametes, and build offspring probabilities one fertilization at a time. Then test the connections in a twelve-question lesson.

A model, with boundaries

Hypothetical plant traits with complete dominance. Two-locus crosses assume independent assortment. These are probabilities for each zygote, not a promised ratio in a small group of offspring.

01 / Choose the parents

Start with a cross

Try a different pattern

A is an allele label, not a measure of strength or frequency. Aa has one copy of each allele; a gamete has one allele per locus.

02 / Follow the routes

From gametes to offspring

Select Explore this cross to see the gametes, fertilization routes and exact probabilities.

Keep the parent genotypes, every gamete route, exact fractions and the model assumptions.

04 / Make the connection

Take the lesson with you

Twelve original questions connect allele segregation, genotype and phenotype, one-locus crosses and independent two-locus crosses. Worked explanations and transfer prompts help you check your reasoning.

  1. Download the course JSON below.
  2. Open RecallWeave and choose the local course file.
  3. Review the preview, then select Start this deck. Your current lesson changes only when you choose to start it.
  4. Complete the lesson, retry missed connections, and download your study notes.
Open RecallWeave ↗

A question to carry forward

One label can hide two routes.

For Aa × Aa, choose each cell that produces Aa. One parent can supply A and the other a, or the contributions can be reversed.

Now compare the genotype and phenotype summaries. Why do the two summaries group the same cells differently?

Try AABb × Aabb next. Derive its probabilities from its own gametes before reaching for a familiar ratio.

Read the worked course guide and references ↗
What this model assumes — and what it leaves out

    Linked-locus gamete weights, incomplete dominance, interactions between genes, environmental effects and survival differences require a suitable model. The course includes questions about these boundaries. This explorer stays within the assumptions listed here.