DNA is shaped like a twisted spiral ladder.

_________ are inherited characteristics

DNA is made up of four basic molecules called genes.

The passing of traits from parent to offspring is called

Recessive straights are hidden and not expressed.

________ are small sections of DNA that control the traits of an organism.

When both genes for a trait are expressed the genes have incomplete dominance.

Plants produced by crossing purebred parent plants that each have a different form of the same trait are called _______

Your traits are determined by your genes.

The double helix describes the shape of __________

Plants that show different characteristics in succeeding generations are purebreds.

The blending together of the genes for a trait is called codominance.

___________ discovered the shape of the DNA molecule.

Genetics is the study of how traits are inherited.

The arrangement of genes within an organism is called its __________

The physical appearance of an organism is called its phenotype.

Choose all that apply:

Through his experiments and observations, Mendel concluded that: