Genetics Homozygous Quiz Questions

9 Questions | Total Attempts: 106

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Genetics Homozygous Quiz Questions

There are two types of Allele that a person can have and they are either dominant or recessive. Over the past week in genetics class. The quiz below is made up on a series of questions that are designed to test your understanding when it comes to genetics homozygous. Do you feel like you can tackle it with ease? Give it a shot and see how much you understood.


Questions and Answers
  • 1. 
    In  cats, the Manx (M) allele results in cats without tails, while the recessive allele (m) allows for tail growth. Homozygous M/M cats dies before birth. If 2 Manx cats mate, and they have 3 offspring, what is the chance that at least one has a tail?
    • A. 

      2/3

    • B. 

      1/3

    • C. 

      8/27

    • D. 

      19/27

  • 2. 
    Red hair is recessive to dark hair. Jenny has red hair and has 2  children with Tony who does not have red hair, but his mother does. What is the chance that both of their kids have red hair?
    • A. 

      1/4

    • B. 

      1/2

    • C. 

      1/8

    • D. 

      3/4

  • 3. 
    The A and B blood types differ by a carbohydrate at the end of a chain of carbohydrates.  In type O blood neither type of carbohydrate  is added to the chain. There is a condition called The Bombay phenotype in which the carbohydrate which normally has the A or B carbohydrates attached is missing. This is a recessive condition on another chromosome. Individuals who have this condition cannot have blood type A, B or AB even if their ABO alleles give that blood type.    We will use M to indicate the dominant allele and m to indicate the recessive allele.  Someone who is type O; +/- ; M/m has children with someone who is type AB; +/-; M/m. What is the chance that they have a type  B positive child?   Note that the M gene has no effect on the +/- gene.
    • A. 

      3/4

    • B. 

      9/32

    • C. 

      9/64

    • D. 

      1/32

  • 4. 
    Billy has the following genotype IA IB ; +/-  Penny has the following genotype IA IA; +/-What is the chance that they have a child who is type  A negative?
    • A. 

      None

    • B. 

      1/4

    • C. 

      1/8

    • D. 

      1/16

  • 5. 
    Billy has the following genotype IA IB ; +/-  Penny has the following genotype IA IA; +/- Which one of the following blood types could be found among the offspring
    • A. 

      Type O positive

    • B. 

      Type AB negative

    • C. 

      Type B positive

    • D. 

      All of the above could be found

  • 6. 
    This disease is lethal and strikes early in childhood.
    • A. 

      True

    • B. 

      False

  • 7. 
    The pedigree below is
    • A. 

      Autosomal Recessive

    • B. 

      Autosomal Dominant

    • C. 

      Sex linked Recessive

    • D. 

      Sex linked Dominant

  • 8. 
    The pedigree below is
    • A. 

      Autosomal Recessive

    • B. 

      Autosomal Dominant

    • C. 

      Sex linked recessive

    • D. 

      Sex linked dominant

  • 9. 
    The genotype off the individual indicated by the arrow is
    • A. 

      XA/Y (A should be superscript)

    • B. 

      X/A/Xa (A and a should be superscript)

    • C. 

      XA/XA (A should be superscript)

    • D. 

      A/a

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