A change in the DNA code of an organism is called a (an)

• disaster

• product of natural selection

• mutation

• allele

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Why is asexual reproduction an important part of the function of the human body?

• It is necessary for growth and repair

• It allows for diversity within a species

• It allows humans to produce offspring

• It helps to correct mutations

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What has to happen for a mutation to be inherited by an organism's offspring?

• It has to occur in a body cell

• It has to occur during mitosis

• It has to occur in a reproductive cell

• It has to occur in more than one organism

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The molecule that carries the genetic information for every organism on Earth is called

• DNA

• chromosome

• a gene

• a mitochondria

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A strand of DNA that carries the code for the growth and funtion of a specific organism is called a

• molecule

• gene

• base pair

• chromosome

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In the cell cycle, why is it important for the chromosomes to be duplicated?

• The cells produced during mitosis have to end up being haploid cells

• So that the cells produced in mitosis are exact copies of the original cell

• The cells need to carry half of the genetic material so that sexual reproduction can occur

• So that the chromosomes don't mutate

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What makes the reproductive process in example B different from the other three examples?

• It is an example of sexual reproduction

• It results in offspring that are identical to the parent

• It results in diversity within a species of organisms

• Reproductive cells from two organisms combine to produce an offspring

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How does sexual reproduction help to keep a species healthy?

• It results in greater diversity in the species

• It ensures that mutations don't occur

• It results in four times the number of offspring

• It perfectly duplicates the parent

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How could a harmful mutation continue to be carried through many generations of an organism?

• It can't. A harmful mutation would kill the organism before it reproduces

• The harmful mutation might not be a bad thing in different environments.

• It could be carried as a recessive trait

• If it forms in a body cell it can be replaced.

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The code that directs the formation of a specific characteristic is called a

• chromosome

• centriole

• gene

• allele

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