Science • Biology

Genetics

Master Genetics concepts with free TEAS practice questions and detailed rationales. These questions will help you reinforce your understanding and improve your score on the TEAS exam.

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Topic guide

What you will practice in this topic

This Genetics page is part of the Sciencesection under Biology. Use the free questions below to check your understanding, read the rationale after each answer, and then move into a full TEAS question bank session.

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Free Practice Questions (13)

Question 1medium

Practice Question

Which of the following sugars is found in DNA?

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Question 2medium

Practice Question

In a DNA double helix, the bases are held together by hydrogen bonds. These hydrogen bonds are __________.

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Question 3easy

Practice Question

Which of the following explains why a male is more likely to express a trait like color blindness, which is caused by an X-linked recessive allele?

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Question 4medium

Practice Question

In a study of a rare autosomal dominant disorder, a researcher examines a family where one parent is affected (genotype Aa) and the other is unaffected (aa). Their first child does not have the disorder. What is the probability that their second child will have the disorder, considering Mendel’s principles?

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Question 5medium

Practice Question

Which of the following best describes why males are more likely to express an X-linked recessive trait, such as red-green color blindness?

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Question 6medium

Practice Question

A nurse is preparing a patient education session about DNA’s role in heredity. Which statement best describes the function of DNA in a human cell?

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Question 7medium

Practice Question

A nurse is reviewing a patient’s family history and notes a pattern of color blindness, an X-linked recessive trait. Which family member is most likely to exhibit this condition?

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Question 8easy

Practice Question

A nurse is assessing a patient whose family history indicates a risk of Huntington’s disease, an autosomal dominant disorder. The patient’s father has the disease, and the mother is unaffected. What is the probability that the patient inherited the disease, and what nursing intervention is most appropriate?

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Question 9medium

Practice Question

A nurse is counseling a couple about the risk of their child inheriting cystic fibrosis, an autosomal recessive disorder. Both parents are carriers (heterozygous). What is the probability that their child will have cystic fibrosis, and what nursing action is most appropriate?

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Question 10easy