Genetics Practice Quiz: Trivia Test!

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Genetics Practice Quiz: Trivia Test! - Quiz


Genetics is the study of how different traits such as hair color and texture, eye color, and disease risk are passed down or inherited from parent to offspring. Genetics helps to clarify what makes you unique as an individual. This quiz asks questions like who is considered the father of genetics, what does homozygous recessive genotype mean, and what happens to a chromosome during meiosis. Make sure you take your certificate after the quiz.


Questions and Answers
  • 1. 

    Who is considered the "Father of Genetics"?

    • A.

      Gregor Mendel

    • B.

      Charles Darwin

    • C.

      Steve Jobs

    • D.

      Francis Crick

    Correct Answer
    A. Gregor Mendel
    Explanation
    Gregor Mendel discovered many principles of heredity in the 1800s by working with pea plants.

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  • 2. 

    Which of the following is a homozygous recessive genotype?

    • A.

      TT

    • B.

      Tt

    • C.

      Tt

    Correct Answer
    C. Tt
    Explanation
    Homozygous refers to the fact that both alleles are the same and recessive tells us that the alleles are represented by lower case letters.

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  • 3. 

    Which of the following is a homozygous dominant genotype?

    • A.

      TT

    • B.

      Tt

    • C.

      tt

    Correct Answer
    A. TT
    Explanation
    Homozygous indicates that the alleles are the same and dominant tells us that the alleles are represented by capital letters.

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  • 4. 

    Which of the following is a heterozygous genotype?

    • A.

      TT

    • B.

      Tt

    • C.

      Tt

    Correct Answer
    B. Tt
    Explanation
    Heterozygous means different or one of each type of allele: dominant and recessive.

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  • 5. 

    What happens to the chromosome number during meiosis?

    • A.

      It doubles.

    • B.

      It stays the same.

    • C.

      It halves.

    • D.

      It quadruples.

    Correct Answer
    C. It halves.
    Explanation
    Meiosis cuts the number of chromosomes in the parent cell in half to produce two haploid cells.

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  • 6. 

    A diploid cell has _____ set(s) of homologous chromosomes.

    • A.

      One

    • B.

      Two

    • C.

      Three

    • D.

      Four

    Correct Answer
    B. Two
    Explanation
    Di means two so the word diploid means two sets of chromosomes. Diploid cells are produced during mitosis.

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  • 7. 

    A haploid cell has _______ set(s) of chromosomes.

    • A.

      One

    • B.

      Two

    • C.

      Three

    • D.

      Four

    Correct Answer
    A. One
    Explanation
    Ha refers to half so a haploid cell contains only one set of chromosomes. Gametes are haploid cells.

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  • 8. 

    The possible form of a gene is called a(n) _____________.

    • A.

      Trait

    • B.

      Gamete

    • C.

      Hybrid

    • D.

      Allele

    Correct Answer
    D. Allele
    Explanation
    Mendel dubbed the different forms of gene alleles. In a monohybrid cross, the two alleles are dominant and recessive.

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  • 9. 

    Haploid cells are formed during the process of ____________.

    • A.

      Mitosis

    • B.

      Meiosis

    • C.

      Fertilization

    • D.

      Nondisjunction

    Correct Answer
    B. Meiosis
    Explanation
    Meiosis produces gametes which are haploid cells so that when a male and a female gamete meet in the process of fertilization the resulting zygote has the full number of chromosomes to produce a healthy individual.

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  • 10. 

    Another name for haploid cells are _________.

    • A.

      Gametes

    • B.

      Genes

    • C.

      Karyotypes

    • D.

      Alleles

    Correct Answer
    A. Gametes
    Explanation
    Gametes must be haploid in order for the zygote to receive the correct number of chromosomes.

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  • 11. 

    The types of cells produced during mitosis are _________.

    • A.

      Haploid

    • B.

      Diploid

    • C.

      Gametes

    • D.

      Zygotes

    Correct Answer
    B. Diploid
    Explanation
    Mitosis produces a cell that is exactly like the parent cell, with the full number of chromosomes.

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  • 12. 

    A human body cell contains 46 chromosomes. How many chromosomes does a human gamete contain?

    • A.

      12

    • B.

      23

    • C.

      46

    • D.

      92

    Correct Answer
    B. 23
    Explanation
    Gametes are haploid cells. They contain half the number of chromosomes as a normal body (somatic) cell.

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  • 13. 

    The gamete of a fruit fly contains 4 chromosomes. How many chromosomes does a cell from the fruit fly's wing contain?

    • A.

      2

    • B.

      4

    • C.

      6

    • D.

      8

    Correct Answer
    D. 8
    Explanation
    A gamete (egg or sperm) contains half the number of chromosomes of a cell from anywhere on the organism's body.

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  • 14. 

    In a monohybrid cross, when a homozygous dominant individual is crossed with a homozygous recessive individual all of the offspring will be __________.

    • A.

      Homozygous dominant

    • B.

      Heterozygous

    • C.

      Homozygous recessive

    Correct Answer
    B. Heterozygous
    Explanation
    TT x tt = 100% Tt

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  • 15. 

    In a monohybrid cross, when two heterozygous individuals are crossed the genotypic ratio will be _______________.

    • A.

      4 heterozygous

    • B.

      3 dominant 1 recessive

    • C.

      1 homozygous dominant, 2 heterozygous, 1 homozygous recessive

    Correct Answer
    C. 1 homozygous dominant, 2 heterozygous, 1 homozygous recessive
    Explanation
    Tt x Tt = 1 TT: 2 Tt: 1 tt

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  • 16. 

    Which of the following are true of gametes?

    • A.

      Are formed during meiosis

    • B.

      Are haploid cells

    • C.

      Examples are eggs and sperm

    • D.

      Are formed during mitosis

    • E.

      Are diploid cells

    • F.

      When joined form a diploid cell

    Correct Answer(s)
    A. Are formed during meiosis
    B. Are haploid cells
    C. Examples are eggs and sperm
    F. When joined form a diploid cell
    Explanation
    Gametes are formed during meiosis, which is a type of cell division that produces haploid cells. Haploid cells contain half the number of chromosomes compared to the parent cell. Examples of gametes are eggs and sperm, which are reproductive cells in females and males, respectively. When gametes fuse during fertilization, they form a diploid cell, which contains the full set of chromosomes. Therefore, the statement "are formed during meiosis, are haploid cells, examples are eggs and sperm, when joined form a diploid cell" is true.

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  • 17. 

    A normal man has 4 daughters, 4 sons, and 12 grandchildren. A daughter and a son have inherited a certain disease but the grandchildren are unaffected. This is an example of

    • A.

      Sex-linked dominant

    • B.

      Autosomal recessive

    • C.

      Autosomal dominant

    • D.

      Non-paternity

    Correct Answer
    B. Autosomal recessive
    Explanation
    Autosomal recessive traits are only expressed in people if they are homozygous recessive. Autosomal means that the trait is inherited regardless of gender.

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  • 18. 

    Both males and females have this chromosome.

    • A.

      X

    • B.

      Y

    • C.

      L

    Correct Answer
    A. X
    Explanation
    All people have at least one X chromosome. XX = female XY = male

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  • 19. 

    Only males have this chromosome

    • A.

      X

    • B.

      Y

    • C.

      L

    Correct Answer
    B. Y
    Explanation
    Females = XX
    Males = XY

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  • 20. 

    Type of factor or gene that can be masked or hidden by a dominant one

    Correct Answer
    Recessive
    Explanation
    A recessive factor or gene is one that is not expressed or visible when a dominant factor or gene is present. This means that the dominant factor or gene "masks" or hides the recessive one, preventing it from being seen or having an effect. In order for a recessive factor or gene to be expressed, both copies of the gene must be recessive, meaning that it is inherited from both parents. If only one copy is recessive and the other is dominant, the dominant gene will be expressed and the recessive one will be masked.

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  • 21. 

    Number of chromosomes in the human cells

    Correct Answer
    forty-six
    46
    Explanation
    The number of chromosomes in human cells is forty-six, which is also represented as 46. Chromosomes are thread-like structures that carry genetic information in the form of DNA. In humans, each cell typically contains 23 pairs of chromosomes, making a total of 46. These chromosomes determine various traits and characteristics of an individual.

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  • 22. 

    Most sex-linked genes are found on the

    • A.

      Y chromosome

    • B.

      O chromosome

    • C.

      YY chromosomes

    • D.

      X chromosome

    Correct Answer
    D. X chromosome
    Explanation
    Sex-linked genes are genes that are located on the sex chromosomes, which determine the sex of an individual. The Y chromosome is responsible for determining male characteristics, while the X chromosome is responsible for determining both male and female characteristics. Therefore, it is more likely for sex-linked genes to be found on the X chromosome rather than the Y chromosome or any other chromosome.

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  • 23. 

    For the genotype below determine what phenotypes are possible. Purple flowers are dominant to white flowers.

    • A.

      PP=White, pp=purple, Pp=White

    • B.

      PP=Purple, pp=Purple, Pp=White

    • C.

      PP=Purple, pp=White, Pp=Purple

    • D.

      PP=White, pp=White, Pp=Purple

    Correct Answer
    C. PP=Purple, pp=White, Pp=Purple
    Explanation
    The genotype PP represents a homozygous dominant individual, which means they have two copies of the dominant allele for purple flowers. Therefore, their phenotype will be purple. The genotype pp represents a homozygous recessive individual, which means they have two copies of the recessive allele for white flowers. Therefore, their phenotype will be white. The genotype Pp represents a heterozygous individual, which means they have one copy of the dominant allele and one copy of the recessive allele. In this case, the dominant allele for purple flowers will determine the phenotype, so their phenotype will be purple.

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Our quizzes are rigorously reviewed, monitored and continuously updated by our expert board to maintain accuracy, relevance, and timeliness.

  • Current Version
  • Jan 17, 2024
    Quiz Edited by
    ProProfs Editorial Team
  • Dec 05, 2012
    Quiz Created by
    Carmichael

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