Unit 4 Genetics Review

Which four nitrogenous bases are found in DNA?

• guanine, cytosine, adenine, thymine

• guanine, uracil, adenine, cytosine

• both a and b

• none of the above

What is a gene?

• Segment of DNA that codes for muscle size

• Segment of DNA that codes for a specific trait or cell function

• Segment of DNA that codes for bleached ends of hair color

• Segment of DNA that codes for absolute muscle strength

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NGSS.HS-LS3-1

In hamsters, brown fur is dominant. A brown hamster is crossed with a white albino hamster. If the litter contains a white offspring, the genotype of the brown-haired parent is probably ________.

• BB or Homozygous

• bb or recessive

• Bb or Heterozygous

• ABCDEFG or hyperzygous

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All are characteristics of DNA EXCEPT

• having deoxyribose sugar.

• being single-stranded.

• being double-stranded.

• having four nitrogenous bases.

If two parents with dominant phenotypes produce an offspring with a recessive phenotype, then most likely the parents are

• both homozygous

• both heterozygous

• one heterozygous and one homozygous

• none of the above

Which kind of sugar is encountered in the nucleotides of DNA?

• deoxyribose

• ribose

• glucose

• none of the above

Which nitrogenous base is only found in RNA?

• uracil

• thymine

• guanine

• cytosine

The process by which RNA is made from DNA is called

• translation.

• transcription.

• replication.

• respiration.

The three letter nucleotide sequence coding for an amino acid is a(n)

• base.

• codon.

• amine.

• serine.

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NGSS.HS-LS1-1

The process in which the cell converts nucleotide language (DNA/RNA) into amino acid language to make proteins is

• translation.

• transcription.

• replication.

• respiration.

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NGSS.HS-LS1-1