A cross following one gene with two alleles, giving a 3:1 phenotype ratio in the F2 generation.
Cross two parents that differ in one trait. Pure TT x tt gives all Tt in F1; Tt x Tt gives 3 tall to 1 dwarf in F2. The ratio appears only with large samples, as it is a probability.
A test cross can reveal unknown genotype.
A cross following one gene with two alleles, giving a 3:1 phenotype ratio in the F2 generation.
Monohybrid Cross is one of the 54 topics in Genetics. It is rated Beginner, so it suits learners who are starting out in biology. Related topics in this area include Dihybrid Cross, Test Cross, Law of Segregation.
Round (R) versus wrinkled (r) peas give 5474 round to 1850 wrinkled in Mendel's data.
Monohybrid Cross is a Beginner topic, so no earlier topic is required. Other Beginner topics in Genetics that pair well with it include Heredity, Gene, Allele.
The closest topics to Monohybrid Cross are Dihybrid Cross, Test Cross, Law of Segregation, Punnett Squares. Comparing them side by side is a good way to see how the ideas connect.
Read the summary and the in-depth section, then use the quick check on the interactive lesson for Monohybrid Cross. To practise the whole of Genetics, use the Genetics quiz.
Monohybrid Cross: A cross following one gene with two alleles, giving a 3:1 phenotype ratio in the F2 generation. Dihybrid Cross: A cross following two genes at once, giving a 9:3:3:1 phenotype ratio when genes assort independently. Read both side by side and note what each one explains.
First, read the summary and write the definition in your own words. Second, read the in-depth section and note any example. Third, compare it with Dihybrid Cross and explain the difference aloud. Finally, take the Genetics quiz and come back to this page for any question you miss.
A cross following two genes at once, giving a 9:3:3:1 phenotype ratio when genes assort independently.
🧬 GeneticsCrossing an unknown dominant phenotype with a homozygous recessive to reveal its genotype.
🧬 GeneticsThe two alleles for a trait separate during gamete formation so each gamete carries only one.
🧬 GeneticsA grid used to predict the possible genotypes and probabilities of offspring from a cross.
🧬 Genetics