A Simple Biology Quiz On Genetics!

Reviewed by Stephen Reinbold
Stephen Reinbold, PhD, Biological Sciences |
Biology Expert
Review Board Member
Stephen Reinbold has a Ph.D. in Biological Sciences with a particular interest in teaching. He taught General Biology, Environmental Science, Zoology, Genetics, and Anatomy & Physiology for almost thirty years at Metropolitan Community College in Kansas City, Missouri. He particularly enjoyed emphasizing scientific methodology and student research projects. Now, enjoying retirement, he works part-time as an editor while also engaging in online activities.
, PhD, Biological Sciences
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A Simple Biology Quiz On Genetics! - Quiz

Welcome to a simple biology quiz on genetics. The study of genetics has led to many breakthroughs in the health sector. It helps one to know the likelihood of developing some diseases. Take up the quiz below and see just how much you understand about simple genetics.

Embark on a journey through the fascinating realm of genetics with "A Simple Biology Quiz on Genetics!" This quiz is tailored to test your understanding of fundamental genetic concepts in a user-friendly and accessible format. Challenge yourself and discover the building blocks of life in this engaging and straightforward Genetics Quiz! All Read morethe best, and keep revising on the ones you get wrong.


Questions and Answers
  • 1. 

    What is the study of heredity?

    • A.

      Hereditology 

    • B.

      DNA

    • C.

      Genetics

    • D.

      Biology

    Correct Answer
    C. Genetics
    Explanation
    Genetics is the study of heredity, which involves the passing of traits from parents to offspring through genes. It encompasses the study of genes, DNA, and how variations in these genetic materials contribute to the inheritance of traits and the development of organisms. By understanding genetics, scientists can gain insights into the mechanisms of heredity, genetic disorders, and the potential for genetic variations in populations.

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  • 2. 

    What is heredity?

    • A.

      The passing of genes from one's parents to offspring

    • B.

      The study of genes

    • C.

      Genetics

    • D.

      Plants scattering pollen

    Correct Answer
    A. The passing of genes from one's parents to offspring
    Explanation
    Heredity refers to the process of passing genes from parents to their offspring. It involves the transmission of genetic information, such as traits and characteristics, from one generation to the next. This passing of genes is responsible for the similarities and resemblances observed between parents and their children. Heredity plays a vital role in determining various physical and biological traits in living organisms, including humans.

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  • 3. 

    What are genes?

    • A.

      A double helix

    • B.

      Food

    • C.

      A code of DNA

    • D.

      The study of Genetics

    Correct Answer
    C. A code of DNA
    Explanation
    Genes are segments of DNA that contain instructions for building and maintaining an organism. They are the fundamental units of heredity and determine an individual's traits and characteristics. The code of DNA refers to the sequence of nucleotides within a gene, which provides the instructions for synthesizing proteins. Therefore, "A code of DNA" is the correct answer as it accurately describes the nature and function of genes.

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  • 4. 

    What does DNA stand for?

    • A.

      Dominant Nuclear Acid

    • B.

      Deoxyribonucleic acid

    • C.

      Daily Nursing Apple-juice

    • D.

      Denominator of Numerous Alleles

    Correct Answer
    B. Deoxyribonucleic acid
    Explanation
    DNA stands for Deoxyribonucleic acid. It is a molecule that carries the genetic instructions for the development, functioning, growth, and reproduction of all known living organisms. DNA is composed of two strands that are twisted together in the shape of a double helix. It contains the genetic information in the form of genes, which are segments of DNA that code for specific proteins. DNA is found in the nucleus of cells and is responsible for the inheritance of traits from parents to offspring.

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  • 5. 

    Alleles are:

    • A.

      Not a part of genetics

    • B.

      The color of the eyes

    • C.

      The shape of the nose

    • D.

      Available forms of genes

    Correct Answer
    D. Available forms of genes
    Explanation
    Alleles are the different variants or forms of a gene that can exist at a specific location on a chromosome. They determine the different traits or characteristics that an organism can have. Each individual inherits two alleles for each gene, one from each parent. These alleles can be the same (homozygous) or different (heterozygous), and they interact to determine the observable traits or phenotypes of an organism. Therefore, alleles are the available forms of genes that contribute to the genetic diversity and variation within a population.

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  • 6. 

    Alleles determine:

    • A.

      Your eye color

    • B.

      Your skin color

    • C.

      The shape of your body

    • D.

      All of the above

    Correct Answer
    D. All of the above
    Explanation
    Alleles are different forms of a gene that determine specific traits in an individual. Eye color, skin color, and the shape of the body are all examples of traits that are influenced by alleles. Therefore, the correct answer is "all of the above" because alleles play a role in determining all of these characteristics.

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  • 7. 

    Alleles are:

    • A.

      Dominant

    • B.

      Acid

    • C.

      Recessive

    • D.

      Both A and B

    • E.

      Both A and C

    • F.

      None of above

    Correct Answer
    E. Both A and C
    Explanation
    Alleles are variations of a gene that can exist at the same locus on homologous chromosomes. They can be either dominant or recessive, meaning that they can determine the expression of a particular trait in an individual. Dominant alleles are always expressed in the phenotype, while recessive alleles are only expressed if there are no dominant alleles present. Therefore, the correct answer is "both A and C" because alleles can be dominant or recessive.

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  • 8. 

    Which term means "same alleles?"

    • A.

      Heterozygous

    • B.

      Hybrid

    • C.

      Homozygous

    • D.

      There is no such term

    Correct Answer
    C. Homozygous
    Explanation
    Homozygous is the term that means "same alleles". In genetics, alleles are different versions of a gene that determine specific traits. Homozygous refers to an individual having two identical alleles for a particular gene. This means that both copies of the gene are the same, whether they are dominant or recessive. In contrast, heterozygous refers to having two different alleles for a gene, and hybrid refers to the offspring of two different species or varieties. Therefore, the correct term for "same alleles" is homozygous.

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  • 9. 

    Homozygous dominants are represented with a:

    • A.

      Capital letter

    • B.

      Roman numeral

    • C.

      Hair color

    • D.

      Lower case letter

    Correct Answer
    A. Capital letter
    Explanation
    Homozygous dominants are represented with a capital letter because in genetics, capital letters are used to denote dominant traits. Homozygous refers to having two identical alleles for a particular gene, and if both alleles are dominant, they are represented by a capital letter. This is a convention used to distinguish dominant traits from recessive traits, which are represented by lowercase letters.

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  • 10. 

    Which word is a synonym to homozygous dominant?

    • A.

      Hybrid

    • B.

      Regular

    • C.

      Purebred

    • D.

      Irregular

    Correct Answer
    C. Purebred
    Explanation
    A purebred refers to an organism that has two identical dominant alleles for a particular trait. Similarly, homozygous dominant also means having two copies of the dominant allele for a specific trait. Therefore, purebred is a synonym for homozygous dominant as both terms describe the same genetic condition.

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  • 11. 

    Which word is a synonym to homozygous recessive?

    • A.

      Hybrid

    • B.

      Purebred

    • C.

      Regular

    • D.

      Irregular

    Correct Answer
    B. Purebred
    Explanation
    A purebred refers to an organism that has two identical alleles for a specific trait, both of which are recessive. This means that the organism will display the recessive trait. Therefore, the term "purebred" is synonymous with "homozygous recessive."

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  • 12. 

    Which word is a synonym to heterozygous?

    • A.

      Hybrid

    • B.

      Purebred

    • C.

      Regular

    • D.

      Irregular

    Correct Answer
    A. Hybrid
    Explanation
    The word "hybrid" is a synonym to heterozygous because both terms refer to the presence of different alleles for a particular trait. Heterozygous describes an individual with two different alleles for a specific gene, while a hybrid is the offspring resulting from the crossbreeding of two different species or varieties. Both words imply a mixture or combination of different genetic traits. Therefore, "hybrid" is the correct answer.

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  • 13. 

    A genotype is:

    • A.

      A physical appearance

    • B.

      A made-up word for gene

    • C.

      Not a word at all

    • D.

      Two alleles

    Correct Answer
    D. Two alleles
    Explanation
    A genotype refers to the combination of alleles (variants of a gene) that an individual possesses for a particular trait or gene. It is not a physical appearance, a made-up word, or a non-existent term. Instead, it specifically represents the two alleles that an organism carries for a specific gene.

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  • 14. 

    A phenotype is:

    • A.

      Physical appearance

    • B.

      A made-up word for gene

    • C.

      Not a word at all

    • D.

      Two alleles

    Correct Answer
    A. Physical appearance
    Explanation
    A phenotype refers to the observable physical characteristics or traits of an organism. It includes features such as eye color, height, and hair texture. This term is used to describe the outward appearance of an individual resulting from the interaction between their genetic makeup (genotype) and environmental factors. Therefore, the correct answer is "physical appearance" as it accurately defines what a phenotype represents in biology.

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Stephen Reinbold |PhD, Biological Sciences |
Biology Expert
Stephen Reinbold has a Ph.D. in Biological Sciences with a particular interest in teaching. He taught General Biology, Environmental Science, Zoology, Genetics, and Anatomy & Physiology for almost thirty years at Metropolitan Community College in Kansas City, Missouri. He particularly enjoyed emphasizing scientific methodology and student research projects. Now, enjoying retirement, he works part-time as an editor while also engaging in online activities.

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  • Feb 01, 2024
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    Expert Reviewed by
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  • Apr 18, 2009
    Quiz Created by
    Nute Gunray

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