Bob Jones Science 6 Chapter 13

The molecules that carry the chemical code that tell cells what to do is _______________

• DNA

• hybrids

• traits

• double helix

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DNA is shaped like a twisted spiral ladder.

• False

• True

_________ are inherited characteristics

• genes

• DNA

• traits

• heredity

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DNA is made up of four basic molecules called genes.

• False

• True

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The passing of traits from parent to offspring is called

• chromosomes

• heredity

• phenotypes

• genes

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Recessive straights are hidden and not expressed.

• True

• False

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

• chromosomes

• purebreds

• genotypes

• genes

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

• True

• False

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

• blended

• hybrid

• purebred

• codominant

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Your traits are determined by your genes.

• True

• False

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