Simple Genetics Quiz Questions And Answers

Reviewed by Stephen Reinbold
Stephen Reinbold, PhD (Biological Sciences) |
Biology Instructor
Review Board Member
Stephen Reinbold has a PhD in Biological Sciences and a strong passion for teaching. He taught various subjects including General Biology, Environmental Science, Zoology, Genetics, and Anatomy & Physiology at Metropolitan Community College in Kansas City, Missouri, for nearly thirty years. He focused on scientific methodology and student research projects. Now retired, he works part-time as an editor and engages in online activities.
 , PhD (Biological Sciences)
By Jeff Talsky
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Jeff Talsky
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  • 1/14 Questions

    Alleles determine

    • Your eye color
    • Your skin color
    • The shape of your body
    • All of the above
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About This Quiz

Let’s take a look at the study of biology, shall we? More specifically, we’ll be looking at the subject, which allows us to analyze our genetic makeup so that we might be able to identify the risk of developing a harmful disease later in life. We are, of course, talking about genetics! Genetics helps us understand how traits are inherited, why certain diseases run in families, and the roles of DNA and genes in our bodies.

Do you think you know everything about the topic? Answer the simple quiz questions on genetics to prove it! From understanding DNA structure to exploring genetic mutations, this quiz will test your foundational knowledge and challenge you to learn more about the fascinating world of genetics. Dive in and see how well you score!

Simple Genetics Quiz Questions And Answers - Quiz

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  • 2. 

    What does DNA stand for?

    • Dominant Nuclear Acid

    • Deoxyribonucleic acid

    • Daily Nursing Applejuice

    • Denominater of Numerous Alleles

    Correct Answer
    A. Deoxyribonucleic acid
    Explanation
    DNA stands for Deoxyribonucleic acid. It is a molecule that carries the genetic instructions used in the development and functioning of all known living organisms. DNA is composed of two strands that are twisted together to form a double helix structure. It contains the genetic information that determines an organism's traits and characteristics. DNA is found in the nucleus of cells and is responsible for transmitting hereditary information from one generation to the next.

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  • 3. 

    Alleles are

    • Not part of genetics

    • The color of the eyes

    • The shape of the nose

    • Alternate forms of genes

    Correct Answer
    A. Alternate forms of genes
    Explanation
    Alleles are the different variations or versions of a gene that exist within a population. They are alternative forms of a gene that can determine different traits or characteristics, such as eye color or nose shape. In genetics, alleles play a crucial role in determining the inheritance of traits from parents to offspring. Therefore, the answer "available forms of genes" accurately describes what alleles are in the context of genetics.

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  • 4. 

    Homozygous dominants are represented with a

    • Capital letter

    • Roman numeral

    • Hair color

    • Lower case letter

    Correct Answer
    A. Capital letter
    Explanation
    Homozygous dominants are represented with a capital letter because in genetics, traits are represented by letters. A capital letter signifies the dominant allele, which is the allele that determines the phenotype or physical appearance of an organism. Homozygous means having two identical alleles for a particular trait, so when an organism is homozygous dominant, both of its alleles for that trait are dominant and are represented by a capital letter. This is a common convention used in genetics to distinguish between different types of alleles and their dominance or recessiveness.

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  • 5. 

    A phenotype is

    • Physical appearance

    • A made-up word for gene

    • Not a word at all

    • Two alleles

    Correct Answer
    A. Physical appearance
    Explanation
    A phenotype refers to the physical appearance of an organism, which includes its observable traits and characteristics. It is the result of the interaction between an organism's genotype (genetic makeup) and its environment. The term "phenotype" is commonly used in genetics and biology to describe the outward manifestation of an organism's genetic information. It encompasses various physical features such as hair color, eye color, height, and other observable traits.

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  • 6. 

    What is heredity?

    • The passing of genes from one's parents to offspring

    • The study of genes

    • Genetics

    • Plants scattering pollen

    Correct Answer
    A. The passing of genes from one's parents to offspring
    Explanation
    Heredity refers to the transmission of genes from parents to their offspring. It involves the passing on of genetic information, such as traits and characteristics, from one generation to the next. This process is responsible for the similarities and resemblances observed between parents and their children. Through heredity, genetic material is inherited and passed down, contributing to the diversity and continuity of life.

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  • 7. 

    Alleles are

    • Dominant

    • Acid

    • Recessive

    • Both a and c

    Correct Answer
    A. Both a and c
    Explanation
    The correct answer is "both a and c" because alleles can be dominant or recessive. Dominant alleles are expressed in the phenotype when present, while recessive alleles are only expressed when there are no dominant alleles present. Therefore, alleles can be either dominant or recessive, or both depending on the specific genetic traits being considered.

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  • 8. 

    Which term means "same alleles?"

    • Heterozygous

    • Hybrid

    • Homozygous

    • There is no term

    Correct Answer
    A. Homozygous
    Explanation
    Homozygous is the term that means "same alleles." In genetics, alleles are alternative forms of a gene that occupy the same position on a specific chromosome. Homozygous refers to an individual having two identical alleles for a particular gene. This means that both copies of the gene are the same, either both dominant or both recessive. Heterozygous, on the other hand, refers to having two different alleles for a particular gene. Hybrid is a general term that can refer to the offspring of two different species or varieties. Therefore, the correct term for "same alleles" is homozygous.

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  • 9. 

    What are genes?

    • A double helix

    • Food

    • A code of DNA

    • The study of Genetics

    Correct Answer
    A. A code of DNA
    Explanation
    Genes are segments of DNA that contain the instructions for building and maintaining an organism. They are responsible for determining the characteristics and traits of an individual. The answer "A code of DNA" accurately describes genes as they are essentially a set of instructions encoded in the DNA molecule. Genes are not a double helix, which refers to the structure of DNA itself. They are also not food or the study of Genetics, although the study of Genetics involves the study of genes.

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  • 10. 

    What is the study of heredity?

    • Hereditology

    • DNA

    • Genetics

    • Biology

    Correct Answer
    A. Genetics
    Explanation
    Genetics is the study of heredity, which involves the passing of traits from parents to offspring through genes. It explores how genes are inherited, how they function, and how they interact with the environment to determine an individual's characteristics. This field of study helps us understand the patterns of inheritance, genetic disorders, and the role of genes in shaping living organisms.

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  • 11. 

    Which word is a synonym to heterozygous?

    • Hybrid

    • Purebred

    • Regular

    • Irregular

    Correct Answer
    A. Hybrid
    Explanation
    The word "hybrid" is a synonym for heterozygous because both terms refer to an organism that has two different alleles for a particular trait. In genetics, heterozygous refers to an individual that carries two different versions of a gene, while a hybrid refers to the offspring of two different species or varieties. Both words convey the idea of a mixture or combination of different genetic material.

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  • 12. 

    Which word is a synonym to homozygous dominant?

    • Hybrid

    • Regular

    • Purebred

    • Irregular

    Correct Answer
    A. Purebred
    Explanation
    A purebred refers to an organism that has two identical dominant alleles for a particular trait. In the context of genetics, homozygous dominant also means having two copies of the dominant allele. Therefore, purebred is a suitable synonym for homozygous dominant as both terms imply the presence of two identical dominant alleles.

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  • 13. 

    Which word is a synonym to homozygous recessive?

    • Hybrid

    • Purebred

    • Regular

    • Irregular

    Correct Answer
    A. Purebred
    Explanation
    A purebred refers to an organism that has two identical alleles for a particular trait, meaning it is homozygous for that trait. In the context of genetics, homozygous recessive refers to an individual that carries two copies of the same recessive allele for a particular trait. Therefore, purebred is a synonym for homozygous recessive as both terms describe the same genetic condition of having two identical alleles for a trait.

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  • 14. 

    A genotype is

    • A physical apperance

    • A made-up word for gene

    • Not a word at all

    • Two alleles

    Correct Answer
    A. Two alleles
    Explanation
    A genotype refers to the genetic makeup of an individual, specifically the combination of alleles that an organism possesses for a particular trait. Alleles are alternative forms of a gene that can occupy the same position or locus on a chromosome. Therefore, a genotype consists of two alleles, one inherited from each parent, that determine the expression of a specific trait in an organism.

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Stephen Reinbold |PhD (Biological Sciences) |
Biology Instructor
Stephen Reinbold has a PhD in Biological Sciences and a strong passion for teaching. He taught various subjects including General Biology, Environmental Science, Zoology, Genetics, and Anatomy & Physiology at Metropolitan Community College in Kansas City, Missouri, for nearly thirty years. He focused on scientific methodology and student research projects. Now retired, he works part-time as an editor and engages in online activities.

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