Genetics Test: What You Should Know?

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| By Katie Cassidy
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Genetics Test: What You Should Know? - Quiz

What do you understand about genetics? Human genes hold a lot of things that scientists are still trying to figure out. If you are a medical student, you have probably read up on human genetics. The quiz below is designed to test just how much you know about genetics. Give it a shot and see just how much you remember about it! All the best!


Questions and Answers
  • 1. 

    What type of cell does mitosis create?

    • A.

      Diploid

    • B.

      Haploid

    • C.

      Gamete

    • D.

      Sperm

    Correct Answer
    A. Diploid
    Explanation
    Mitosis creates diploid or somatic cells.

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  • 2. 

    What is the correct statement to describe the difference between a sex cell and a somatic cell?

    • A.

      Somatic cells have 1/2 the DNA of a sex cell

    • B.

      Somatic cells are haploid

    • C.

      Sex cells are produced by meiosis

    • D.

      Sex cells are diploid

    Correct Answer
    C. Sex cells are produced by meiosis
    Explanation
    Sex cells, also known as gametes, are produced through a process called meiosis. Meiosis is a type of cell division that results in the production of gametes with half the number of chromosomes as somatic cells. This means that sex cells are haploid, containing only one set of chromosomes. In contrast, somatic cells are diploid, meaning they have two sets of chromosomes. Therefore, the correct statement to describe the difference between a sex cell and a somatic cell is that sex cells are produced by meiosis.

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  • 3. 

    Which of the following statements is incorrect about genes?

    • A.

      A gene is a small piece of DNA

    • B.

      Genes contain 2 alleles

    • C.

      Genes are found in the nucleus

    • D.

      Genes are found on chromosomes

    • E.

      Genes are only in somatic cells

    Correct Answer
    E. Genes are only in somatic cells
    Explanation
    The statement "genes are only in somatic cells" is incorrect. Genes are present in both somatic cells and germ cells. Somatic cells are any cells in the body other than reproductive cells, while germ cells are the cells involved in reproduction, such as sperm and egg cells. Genes are responsible for the inheritance of traits from parents to offspring, and they are found in the nucleus of cells, where they are located on chromosomes. Each gene contains two alleles, which are different forms of the same gene.

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  • 4. 

    If an organism is DdGg, what is one of the alleles that would be found in the gametes produced?

    • A.

      Dd

    • B.

      DG

    • C.

      D

    • D.

      G

    • E.

      Gg

    Correct Answer
    B. DG
    Explanation
    An organism with the genotype DdGg has two different alleles for each gene. One of the alleles that would be found in the gametes produced would be DG. This is because during gamete formation, the alleles segregate independently, and each gamete receives one allele from each gene. Therefore, the gametes produced by the organism would have the allele combination D and G, resulting in the allele DG.

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  • 5. 

    Who is considered the father of genetics?

    • A.

      Charles Darwin

    • B.

      Gregor Mendel

    • C.

      James Watson

    • D.

      Francis Crick

    • E.

      Thomas Morgan

    Correct Answer
    B. Gregor Mendel
    Explanation
    Gregor Mendel is considered the father of genetics because of his groundbreaking work on pea plants in the 19th century. Through his experiments, Mendel discovered the principles of inheritance and the basic laws of genetics, which laid the foundation for the modern understanding of genetics. Mendel's work was not widely recognized during his lifetime, but his discoveries were later rediscovered and became the basis for the field of genetics. His experiments and observations paved the way for future scientists to further explore and understand the mechanisms of heredity.

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  • 6. 

    If you wanted to determine the phenotype of an organism, what procedure would you follow?

    • A.

      DNa sequence the parents

    • B.

      DNA fingerprint the organism

    • C.

      Look at the physical characteristics of the organism

    • D.

      Do a dihybrid cross

    Correct Answer
    C. Look at the physical characteristics of the organism
    Explanation
    To determine the phenotype of an organism, one would look at the physical characteristics of the organism. Phenotype refers to the observable traits or characteristics of an organism, such as its appearance, behavior, or other physical attributes. By examining and analyzing the physical features of the organism, one can determine its phenotype. This can be done through direct observation or by conducting experiments or tests to assess specific traits or characteristics.

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  • 7. 

    If a disease is said to be sex-linked, what pair of chromosomes must contain the gene responsible for the disease?

    • A.

      21st pair

    • B.

      22nd pair

    • C.

      23rd pair

    • D.

      46th pair

    • E.

      47th pair

    Correct Answer
    C. 23rd pair
    Explanation
    If a disease is said to be sex-linked, it means that the gene responsible for the disease is located on the sex chromosomes. In humans, the sex chromosomes are the 23rd pair, consisting of one X chromosome and one Y chromosome in males, and two X chromosomes in females. Therefore, the gene responsible for the disease must be located on the 23rd pair of chromosomes.

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  • 8. 

    An entire gene has been removed from a chromosome by a mutation.  This type of mutation is best described as a...

    • A.

      Deletion

    • B.

      Duplication

    • C.

      Translocation

    • D.

      Inversion

    • E.

      Substitution

    Correct Answer
    A. Deletion
    Explanation
    An entire gene being removed from a chromosome is best described as a deletion. A deletion mutation occurs when a segment of DNA is lost or deleted from a chromosome. In this case, the deletion resulted in the removal of an entire gene from the chromosome. This type of mutation can have significant effects on the functioning of the gene and can lead to various genetic disorders or abnormalities.

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  • 9. 

    If an organism is trisomy 21, how many total chromosomes do they have?

    • A.

      46

    • B.

      23

    • C.

      47

    • D.

      24

    • E.

      18

    Correct Answer
    C. 47
    Explanation
    If an organism is trisomy 21, it means they have three copies of chromosome 21 instead of the usual two. Therefore, their total number of chromosomes would be 47.

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  • 10. 

    During anaphase of Meiosis, the chromosomes fail to separate properly. This causes there to be an uneven amount distributed to the resulting daughter cells. What is this called?

    • A.

      Nondisjunction

    • B.

      Separation failure

    • C.

      Mutagenic determination

    • D.

      Mitosis

    Correct Answer
    A. Nondisjunction
    Explanation
    During anaphase of Meiosis, when the chromosomes fail to separate properly, it leads to an uneven distribution of chromosomes in the resulting daughter cells. This phenomenon is known as nondisjunction. Nondisjunction can result in an abnormal number of chromosomes in the daughter cells, leading to genetic disorders such as Down syndrome.

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  • 11. 

    Sister chromatids are joined together by

    • A.

      Centromeres

    • B.

      Centrosomes

    • C.

      Chromosomes

    • D.

      Chromomeres

    Correct Answer
    A. Centromeres
    Explanation
    Sister chromatids are joined together by centromeres. Centromeres are specialized regions on chromosomes where the two sister chromatids are attached. They play a crucial role during cell division, ensuring that each daughter cell receives one complete set of chromosomes. Centromeres also serve as attachment points for spindle fibers, which help separate the sister chromatids during cell division. Therefore, centromeres are responsible for maintaining the integrity of the chromosome structure and ensuring accurate distribution of genetic material.

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  • 12. 

    If a diploid cell in a plant has 32 chromosomes, how many chromosomes will be in each of its gametes?

    • A.

      32

    • B.

      30

    • C.

      16

    • D.

      14

    Correct Answer
    C. 16
    Explanation
    In a diploid cell, there are two sets of chromosomes. If the plant cell has 32 chromosomes, it means it has 16 pairs of chromosomes. During the process of meiosis, the diploid cell divides to form four haploid cells called gametes. Each gamete will contain only one set of chromosomes. Therefore, each gamete will have 16 chromosomes, which is half the number of chromosomes present in the diploid cell.

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  • 13. 

    Mendels law of ___________________ states that some alleles are dominant over other alleles.

    • A.

      Independent assortment

    • B.

      Dominance

    • C.

      Segregation

    • D.

      Recession

    Correct Answer
    B. Dominance
    Explanation
    Mendel's law of dominance states that some alleles are dominant over other alleles. This means that when an organism has two different alleles for a trait, the dominant allele will be expressed, while the recessive allele will be masked. This principle explains why certain traits are more commonly observed in a population, as the dominant alleles are more likely to be passed on to future generations.

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  • 14. 

    If an offspring is said to be homozygous recessive, which of the following could be its genotype?

    • A.

      RrSs

    • B.

      Tt

    • C.

      TTss

    • D.

      Ss

    Correct Answer
    C. TTss
    Explanation
    If an offspring is said to be homozygous recessive, it means that both of its alleles for a particular trait are recessive. In this case, the genotype TTss fits the criteria because both alleles for the trait are recessive (ss) and there are no dominant alleles present. The other options (RrSs, Tt, ss) do not meet the criteria because they either have dominant alleles present or are not homozygous recessive.

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  • 15. 

    Which of the following statements describes an organism that produces offspring that would be an exact copy of the original?

    • A.

      Asexually reproducing human offspring

    • B.

      Sexually reproducing human offspring

    • C.

      Asexually reproducing bacteria

    • D.

      Sexually reproducing bacteria

    Correct Answer
    C. Asexually reproducing bacteria
    Explanation
    Asexually reproducing bacteria produce offspring that are exact copies of the original organism. This means that the offspring inherit the same genetic information as the parent, resulting in identical characteristics and traits. Asexual reproduction does not involve the fusion of gametes or the mixing of genetic material, so there is no variation or genetic diversity in the offspring.

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  • Current Version
  • Mar 22, 2023
    Quiz Edited by
    ProProfs Editorial Team
  • Oct 28, 2009
    Quiz Created by
    Katie Cassidy

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