Chapter 11 Genetics Practice Quiz

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  • 1/25 Questions

    Female = XX while Male = ________

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About This Quiz

Genetics is a branch of biology concerned with the study of genes and heredity in organisms. By studying genetics we get to have a clear idea of some diseases and consequently prevent diagnose and cure them. With the Block Bio test coming right up the quiz below on chapter 11 on genes is designed to help you know how ready you are to pass it. Give it a shot and all the best!

Chapter 11 Genetics Practice Quiz - Quiz

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  • 2. 

    Sex Chromosomes consist of...

    • X Only

    • X and 2 Y's

    • Y Only

    • X and Y

    Correct Answer
    A. X and Y
    Explanation
    Sex chromosomes consist of X and Y. In humans, females have two X chromosomes (XX) and males have one X and one Y chromosome (XY). The presence of the Y chromosome determines the development of male characteristics, while the absence of the Y chromosome leads to the development of female characteristics. Therefore, the correct answer is X and Y.

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  • 3. 

    Dominant will always mask the recessive allele.

    • True

    • False

    Correct Answer
    A. True
    Explanation
    The statement is true because in genetics, the dominant allele is expressed and masks the effects of the recessive allele. This means that even if an individual has both a dominant and recessive allele for a particular trait, only the dominant allele will be visible in their phenotype. The recessive allele will only be expressed if an individual has two copies of it, meaning they are homozygous recessive.

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  • 4. 

    Type O blood's genotype is ii

    • True

    • False

    Correct Answer
    A. True
    Explanation
    The genotype for Type O blood is ii, which means that it lacks both A and B antigens on the red blood cells. This is the correct answer because individuals with Type O blood have two copies of the "i" allele, which does not produce any antigens.

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  • 5. 

    Pedigrees show a family history tracing for one specific trait

    • True

    • False

    Correct Answer
    A. True
    Explanation
    Pedigrees are diagrams that show the inheritance of a specific trait or condition within a family. They are commonly used in genetics to track the occurrence of genetic disorders or traits within a family tree. By analyzing a pedigree, one can determine patterns of inheritance and identify individuals who are carriers or affected by the trait. Therefore, the statement that pedigrees show a family history tracing for one specific trait is true.

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  • 6. 

    A Hemophiliac is a normal trait

    • True

    • False

    Correct Answer
    A. False
    Explanation
    A Hemophiliac is not a normal trait. Hemophilia is a genetic disorder that affects the blood's ability to clot, resulting in excessive bleeding. It is caused by a mutation in one of the genes responsible for blood clotting. People with hemophilia have a deficiency or absence of certain clotting factors, which can lead to spontaneous bleeding or excessive bleeding following injuries or surgeries. This condition is inherited and cannot be considered a normal trait.

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  • 7. 

    Write the 2 dominant traits (homozygous and heterozygous) [use F and f] Heterozygous: ________ Homozygous: ________ Use and between the two

    Correct Answer
    Ff and FF
    Explanation
    The correct answer is Ff and FF. This is because heterozygous traits have two different alleles, represented by different letters (Ff), while homozygous traits have two identical alleles, represented by the same letter (FF). In this case, Ff represents the heterozygous trait, while FF represents the homozygous trait.

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  • 8. 

    Recessive traits on the X chromosome are more likely to appear in men because they have only 1 X chromosome

    • True

    • False

    Correct Answer
    A. True
    Explanation
    Men have one X chromosome and one Y chromosome, while women have two X chromosomes. This means that if a man inherits a recessive trait on his X chromosome, he will express that trait because he does not have another X chromosome to mask it. In contrast, women have two X chromosomes, so even if they inherit a recessive trait on one X chromosome, they may have a dominant allele on the other X chromosome that masks the recessive trait. Therefore, recessive traits on the X chromosome are more likely to appear in men.

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  • 9. 

    X Inactivation is when females turn off 1 x-chromosome (pick and chose the best variation)

    • True

    • False

    Correct Answer
    A. True
    Explanation
    X inactivation is a natural process that occurs in female mammals, including humans, where one of the X chromosomes in each cell is randomly inactivated. This is to ensure equal gene expression between males and females, as males only have one X chromosome. The inactivated X chromosome becomes a condensed structure called a Barr body. This process occurs early in embryonic development and is maintained throughout the individual's life. Therefore, the statement that X inactivation is when females turn off one X chromosome is true.

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  • 10. 

    Autosomes are Chromosomes from 1 to ______

    Correct Answer
    22
    Explanation
    Autosomes are chromosomes that are not involved in determining the sex of an individual. In humans, there are a total of 23 pairs of chromosomes, with one pair being the sex chromosomes (X and Y) and the remaining 22 pairs being autosomes. Therefore, the correct answer is 22.

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  • 11. 

    Multiple Alleles are...

    • A 3 or more allele mix being heterozygous

    • Example: Blood TISSUE

    • More than 2 alleles control the phenotype for a certain trait

    • Doesn't create co-dominance

    Correct Answer
    A. More than 2 alleles control the phenotype for a certain trait
    Explanation
    Multiple alleles refer to a situation where more than two alleles exist for a particular gene in a population. These different alleles can control the phenotype, or observable characteristics, of an organism. In the case of blood tissue, there are three alleles - A, B, and O - that determine the blood type. Each individual can have two of these alleles, resulting in different blood types. This phenomenon does not create co-dominance, where both alleles are expressed equally, but rather follows a specific pattern of dominance and recessiveness.

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  • 12. 

    Body Cells Have

    • 23 cells

    • 46 cells

    • 92 cells

    Correct Answer
    A. 46 cells
  • 13. 

    Polygenic Traits are traites that are controlled by only 2 genes

    • True

    • False

    Correct Answer
    A. False
    Explanation
    Polygenic traits are traits that are controlled by multiple genes, not just two genes. These traits are influenced by the interaction of many different genes, each contributing a small effect to the overall phenotype. Therefore, the statement that polygenic traits are controlled by only 2 genes is incorrect.

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  • 14. 

    In Blood types there is A  B  O. Does it have 3 alelles? (Hint: doesn't exactly go along with the multiple alleles amount) And Are A and B codominant?

    • True

    • False

    Correct Answer
    A. True
    Explanation
    The question is asking if there are 3 alleles in blood types, which doesn't necessarily align with the concept of multiple alleles. The answer is true because blood types indeed have three alleles (A, B, and O). Additionally, the question asks if A and B are codominant, which is also true as both alleles can be expressed simultaneously in individuals with AB blood type.

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  • 15. 

    Femlaes Inactive one of their X chromosomes

    • True

    • False

    Correct Answer
    A. True
    Explanation
    Females have two X chromosomes, but in order to prevent an overdose of X chromosome genes, one of the X chromosomes is inactivated. This process is known as X chromosome inactivation or Lyonization. It occurs randomly in early embryonic development and results in the formation of a Barr body, which is a condensed, inactive X chromosome. This inactivation ensures that both males and females have an equal dosage of X chromosome genes. Therefore, the statement "Females inactive one of their X chromosomes" is true.

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  • 16. 

    Nondisjunction can happen in meiosis 1 and also meiosis 2

    • True

    • False

    Correct Answer
    A. True
    Explanation
    During meiosis, the process of cell division that produces gametes (sperm and eggs), nondisjunction can occur in both meiosis 1 and meiosis 2. Nondisjunction is the failure of homologous chromosomes or sister chromatids to separate properly, resulting in an abnormal distribution of chromosomes in the resulting gametes. This can lead to genetic disorders such as Down syndrome. Therefore, the statement that nondisjunction can happen in both meiosis 1 and meiosis 2 is true.

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  • 17. 

    FF = Red ff = White Ff = Pink This is an example of a...

    • Genotype Incomplete Dominance

    • Phenotype Incomplete Dominance

    • Phenotype Codominance

    • Tri-Sessive Mixture

    Correct Answer
    A. Phenotype Incomplete Dominance
    Explanation
    This example demonstrates incomplete dominance in the phenotype. In incomplete dominance, neither allele is completely dominant over the other, resulting in a blending or intermediate phenotype. In this case, the FF genotype produces a red phenotype, ff genotype produces a white phenotype, and Ff genotype produces a pink phenotype.

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  • 18. 

    Type B (Blood) can...

    • Genotype - (I^B)(I^B)

    • Receives type A blood not AB

    • Donate to AB

    • Receives from Type O

    Correct Answer(s)
    A. Genotype - (I^B)(I^B)
    A. Donate to AB
    A. Receives from Type O
    Explanation
    The given answer is correct because individuals with Type B blood have the genotype (I^B)(I^B), which means they have two copies of the B allele. This genotype allows them to donate blood to individuals with Type AB blood because the AB blood type has both A and B antigens, and the B antigen is compatible with the B allele. Additionally, individuals with Type B blood can receive blood from individuals with Type O blood because Type O blood does not have A or B antigens, making it compatible with any blood type.

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  • 19. 

    Sex Linked Traits Examples are 

    • Fertility amounts

    • How tall a person will eventually be

    • Red/green colorblindness

    • Increase in hair amounts

    Correct Answer
    A. Red/green colorblindness
    Explanation
    Red/green colorblindness is an example of a sex-linked trait because it is caused by a gene located on the sex chromosomes, specifically the X chromosome. This means that the trait is more commonly seen in males, as they only have one X chromosome and are more likely to inherit the gene. Females, on the other hand, have two X chromosomes and would need to inherit the gene from both parents to exhibit the trait. Red/green colorblindness is characterized by difficulty in distinguishing between red and green colors.

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  • 20. 

    Nondisjuction - It produces sex cells with ___proper amounts of chromosomes

    Correct Answer
    im
  • 21. 

    Non-Disjunctional can only occur in sex chromosomes

    • True

    • False

    Correct Answer
    A. False
    Explanation
    Can occur in autosomals

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  • 22. 

    NonDisjunction

    • Unequal Separation of chromosomes during meiosis 2 in ANAPHASE

    • Equal Separation of Mitosis though, Unequal in Meiosis 2 in ANAPHASE

    • Unequal Separation of chromosomes during meiosis 1

    Correct Answer
    A. Unequal Separation of chromosomes during meiosis 1
    Explanation
    During meiosis 1, homologous chromosomes separate, resulting in two daughter cells with an unequal distribution of chromosomes. This is known as non-disjunction. Non-disjunction can lead to genetic disorders and abnormalities in the offspring, as the resulting cells may have an abnormal number of chromosomes. In contrast, during meiosis 2, sister chromatids separate, resulting in four daughter cells with an equal distribution of chromosomes. Therefore, the correct answer is "Unequal Separation of chromosomes during meiosis 1."

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  • 23. 

    Type A (blood can)..

    • Has a Genotype of (I^A)(i)

    • Has a Phenotype of High Sodium Blood

    • Can Donate to O

    • Can Donate to Type AB

    • Receives from Type A or Type O

    Correct Answer(s)
    A. Has a Genotype of (I^A)(i)
    A. Can Donate to Type AB
    A. Receives from Type A or Type O
    Explanation
    The given correct answer states that Type A blood has a genotype of (I^A)(i), which means it carries both the A and the O alleles. This genotype allows Type A blood to donate to Type AB because Type AB individuals have both A and B antigens on their red blood cells. Type A blood can also receive blood from Type A or Type O individuals because Type A blood can recognize and accept both A and O antigens.

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  • 24. 

    Sex Linked traits are found on DNA

    • True

    • False

    Correct Answer
    A. False
    Explanation
    Sex Linked traits are found on the X chromosome

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  • 25. 

    When Both alleles are present and show up unmasked...

    • This is Codominance

    • A Solid Mixture will show

    • A heterozygous allele

    • This is Incomplete Dominance

    • Dominance

    • Both will show, ex. Silver Stars and Polka Dots

    Correct Answer(s)
    A. This is Codominance
    A. A heterozygous allele
    A. Both will show, ex. Silver Stars and Polka Dots
    Explanation
    The given answer correctly explains that when both alleles are present and show up unmasked, it is an example of codominance. In codominance, both alleles are expressed fully and neither is dominant or recessive over the other. The answer also mentions that a heterozygous allele will be present, which means that the individual carries two different alleles for the same trait. The example given of "Silver Stars and Polka Dots" further illustrates that both alleles are expressed and visible in the phenotype.

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  • Current Version
  • Mar 21, 2023
    Quiz Edited by
    ProProfs Editorial Team
  • Nov 30, 2011
    Quiz Created by
    Ncorsi
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