The Monohybrid Cross

Mendel took different WHAT parent plants and crossed them (mated them) recording the results of how WHAT is passed to the offspring

Mendel took different TRUE-BREEDING parent plants and crossed them (mated them) recording the results of how ONE TRAIT is passed to the offspring

P generation

Purple flower (true breeding type) x White flower (true-breeding type) will = what

F1 generation

100% purple flowers → no White flower (white flower was masked)

What is a PHENOTYPE

Describing your characteristics

ex: purple flower

Results from Monohybrid Crosses for varying Characteristics

• Round seed plants x Wrinkled seed plants

• Yellow seed x Green seed

• Inflated pod x constricted pod

• Green pod x Yellow pod

• Side flower x Top flower

• Tall plant x Short plant

• Purple flower x White flower

• Round seed

• Yellow seed

• Inflated pod

• Green pod

• Side flower

• Short plant

• Purple flower

Mendel took the plants from the WHAT generation and crossed them (mated them) with each other

F1 generation (the hybrid - made from the cross between two true-breeding parents)

P generation

Purple flower x white flower =

F1 generation

Purple flower x Purple flower

F1 generation

Purple flower x Purple flower (self-fertilization) =

F2 generation

• Purple flower

• Purple flower

• Purple flower

• White flower

3:1

ex: if you have 700 flower how many will be purple an dhow many will be white

700 × 0.75 (cause 3/4) = 525 purple and 125 white

Mendel repeated his experiments with all of the WHAT and with large numbers of plants - always obtained the WHAT

Mendel repeated his experiments with all of the DIFFERENT TRAITS and with large numbers of plants - always obtained the SAME RESULTS

F1 generation always displayed the traits of the WHAT

DOMINANT factor

F2 generation always redisplayed the WHAT

RECESSIVE trait in ¼ of the offspring