DNA Genes Chromosome

What is a gene?

• An entire chromosome that  codes for a trait

• a piece of clothing

• a piece of a DNA on chromosome that codes for a trait

• Chemical messengers in your brain that code for a trait

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Which organelle is DNA usually found in?

• cell membrane

• vacuole

• chloroplast

• nucleus

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What is a genotype? 

• The genetic make up (code)

• The physical trait

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Which of the following best describes a DNA molecule?

• double helix

• contains ribose

• made of amino acids

• contains Uracil

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The number of human chromosomes is

• 23

• 46

• 92

• 64

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Which of the following statements about chromosomes is correct?

• Chromosomes are long, thread-like structures

• Chromosomes are found in the nucleus of all cells in the human body

• Chromosomes contain DNA

• All of the above

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There is a segment of DNA that codes for every trait that a person has. These segments of DNA are found on

chromosomes and are called ________.

• Deoxyribonucleic acid

• Genes

• Heredity

• Recessive Traits

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A single piece of coiled DNA found in the cells; contains genes that encode traits.

• gene

• chromosome

• trait

• DNA

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DNA coils up into threadlike structures called______.

• traits

• chromatin

• chromosomes

• cells

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The order of nitrogenous bases in DNA is

• not important

• referred to as the genetic code

• constantly changing inside one cell

• cannot be copied

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