NC Biology Genetics

Which will most likely cause an increase in the frequency of genetic mutations in humans?

• increased exposure to mold spores in the air

• increased exposure to rising levels of atmospheric CO₂

• increased exposure to bacteria in drinking water

• increased exposure to X-rays

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What would most likely be produced when a cell with eight chromosomes undergoes mitosis?

• two cells with four chromosomes each

• two cells eight chromosomes each

• four cells with four chromosomes each

• four cells with eight chromosomes each

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During translation, what does the tRNA deliver to the ribosomes?

• amino acids

• DNA

• mRNA

• proteins

Identical twin girls are separated at birth and cared for by two different families. After twenty years, the twins have different heights and weights. What is most likely the cause of these differences?

• One twin had a genetic condition that prevented her from growing tall.

• The DNA of one twin was different from the DNA of the other twin.

• Each twin was provided a different diet and physical activities.

• The proteins made by one twin were different that the proteins made by the other twin.

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A mutation is

• any change that is harmful

• any change in a gene or chromosome

• any change that is helpful

• any change in the phenotype

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Who was considered to be the father of Genetics?

• Charles Darwin

• Aristotle

• John Newton

• Gregor Mendel

Scientific study of heredity

• Genetics

• Heredity

• Anatomy

• Biology

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A complex molecule (double helix - “twisted staircase”) that carries the code for organisms’ traits, which is passed on from generation to generation.

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The scientific study of heredity.

• Biology

• Gene Therapy

• Genetic Counseling

• Genetics

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Which molecules are joined together to make proteins?

• fatty acids

• nucleic acids

• amino acids

• acetic acids

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