Challenge 1
Predict flower-color yield
Calculate the expected number of white offspring when incomplete dominance produces three phenotypes.
Application library0/4 attempted
B.8B·Biology·Genetics
Genetic Crosses in the real world
Predict outcomes of monohybrid, dihybrid, and non-Mendelian crosses (codominance, incomplete dominance, sex-linked).
Transfer evidence, not just familiar practice
Correctly solve different fresh variations at least 24 hours after your first correct transfer response. Reviewing the same challenge again does not count as fresh retention evidence.
You can explore every situation now. Practice unlocks after you retain B.6C.
Career · Agriculture and animal science
Plant and animal breeding
A breeder predicts flower colors in a new crop and estimates trait combinations in a mammal breeding program. Both decisions use probabilities rather than guarantees about individual offspring.
Why this TEKS matters
Punnett squares and independent probabilities turn parental genotypes into expected phenotypes across large numbers of offspring.
Challenge 2
Combine two inherited traits
Find the fraction of offspring expected to have brown fur and a tail when the genes assort independently.
Everyday life · Genetic counseling and gardening
Family traits and garden experiments
A family asks about an X-linked condition, and a gardener uses a test cross to infer the genotype of a tall plant. Both cases require interpreting conditional evidence carefully.
Why this TEKS matters
Genetic crosses help estimate probabilities and infer unknown genotypes, but expected ratios do not determine every individual outcome.
Challenge 3
Interpret a family probability
Determine what must be true of a daughter of a carrier mother and unaffected father before adding other information.
Challenge 4
Infer a plant's genotype
Use the nearly equal numbers of tall and short test-cross offspring to choose the supported genotype.