How many chromosomes does each human have?

• 23

• 46

• 92

• 10,000

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What is NOT true about chromosomes?

• all living things have 46 chromosomes

• chromosomes are made of DNA

• humans have 23 pairs of chromosomes

• every cell has chromosomes

A child looks very similar to his father. What is true?

• The child got more chromosomes from dad than from mom.

• The child got half of his chromosomes from dad and half from mom.

• The child got all of his genes from dad.

• Boys always look exactly like their father because they are both males.

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What is the correct shape of DNA?

• twisted circle

• an X

• upside down triangle

• double helix

What is the best definition for DNA?

• instructions for one protein

• all of the instructions for a living thing to live and grow

• found in the mitochondria of a cell

• a hazardous molecule

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Where is DNA found?

• in the nucleus of a cell

• only in your blood

• in animals but not plants

• in the cytoplasm of a cell

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A gene is the instructions for _____.

• a plant

• DNA

• one protein

• a chromosome

What is the relationship between genes and DNA?

• A gene is one small section of DNA

• Genes are bigger than DNA

• DNA is in cells but genes are not

• DNA is a small section of a gene

What are chromosomes?

• a double helix shape

• small sections of a gene

• X shapes that hold DNA

• a type of cell

What is generally NOT true about human chromosomes?

• Humans have 46 chromosomes

• you get one of each chromosomes from each parent

• chromosomes have pairs

• some humans have more chromosomes than others

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