Genetics

Cross between two parents that breed true for different versions of two traits.

Each plant, meiosis produces genotypes of a single gamete

When these two plants combine, they produce plants that are heterozygous and purple and tall.

This F1 offspring goes through meiosis and produces four different gametes.

Punnett Square with two of these offspring

9 : 3 : 3 : 1 ratio in the F2 offspring

Evidence of genes on different nonhomologous chromosomes

Epistasis - the products of different genes that interact to produce a phenotype

      Basically when two genes work together to produce a trait

      I.E. Labs
   

Incomplete dominance

     Dominance is usually not complete, since both alleles in a              heterozygous phenotype may be expressed in the phenotype

     I.E. Roses

          AA - red

          aa - white

          Aa - pink

          Two separate genes, but when heterozygous, produces a mixture

Codominance

     When two alleles are inherited

     One from momma

     One from poppa

Multiple Alleles

     When new alleles rise through mutation

     When more than two possible alleles for a trait exist                   

Sex-linked Genes

     Any gene located on a sex chromosome