Mendelian Trait Inheritance Branching Diagram Quiz
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Questions and Answers

What is the relationship between MCR1 and skin color?

  • MCR1 promotes melanocyte survival
  • MCR1 converts pheomelanin to eumelanin (correct)
  • MCR1 is involved in pigment production
  • MCR1 is responsible for Asian light skin
  • In the context provided, what does the presence of the 'dd' genotype indicate?

  • Wild type phenotype
  • Lethal phenotype
  • Dwarfism phenotype
  • Average size phenotype (correct)
  • What is the role of Kittlg in skin color?

  • Kittlg promotes melanocyte survival
  • Kittlg converts pheomelanin to eumelanin
  • Kittlg is responsible for Asian light skin (correct)
  • Kittlg is involved in pigment production
  • How are the phenotypes affected in the case of a mutation in the FGR3 gene?

    <p>Multiple phenotypes with the same gene affected</p> Signup and view all the answers

    What is the significance of polygenic inheritance in determining phenotypes like skin color?

    <p>Phenotype is determined by the accumulation of multiple gene products</p> Signup and view all the answers

    Which type of disorders are typically recognized by striking familial inheritance patterns?

    <p>Monogenic disorders</p> Signup and view all the answers

    What are examples of monogenic disorders according to the text?

    <p>Sickle cell anemia, cystic fibrosis, Huntington disease</p> Signup and view all the answers

    In what type of disorders do multiple genes play a role along with environmental factors?

    <p>Complex disorders</p> Signup and view all the answers

    Which statement is true about monogenic traits?

    <p>Monogenic traits are conferred by variation in a single gene.</p> Signup and view all the answers

    What distinguishes monogenic disorders from complex disorders?

    <p>Inheritance patterns</p> Signup and view all the answers

    Which of the following is NOT an example of a monogenic disorder?

    <p>Asthma</p> Signup and view all the answers

    What term describes a single trait created through the interaction of multiple genes?

    <p>Epistasis</p> Signup and view all the answers

    In the context of phenotypes, what does 'recessive' describe?

    <p>A gene that is only expressed when paired with another recessive gene</p> Signup and view all the answers

    What type of gene action involves two genes working together to cause a particular phenotype?

    <p>Complementary gene action</p> Signup and view all the answers

    What phenomenon is described as successive generations displaying accelerated, earlier-onset, or more severe disease manifestations?

    <p>Anticipation</p> Signup and view all the answers

    In a paternity dispute scenario where O married A and had a B baby, which gene interaction type is likely involved?

    <p>Recessive Epistasis</p> Signup and view all the answers

    In Mendel's experiments, each gene he studied behaved how with respect to each other?

    <p>Completely independent</p> Signup and view all the answers

    In the context of Mendelian inheritance, which database includes a comprehensive listing of Mendelian and non-Mendelian traits and associated genes?

    <p>Online Mendelian Inheritance in Man (OMIM)</p> Signup and view all the answers

    What is the term used to describe traits that do not follow the simple laws of Mendel's pea experiments?

    <p>Non-Mendelian traits</p> Signup and view all the answers

    Which gender is mostly affected by colorblindness, according to the text?

    <p>Men</p> Signup and view all the answers

    In the context of X-linked genes, what is the genetic makeup of men (excluding gametes)?

    <p>Haploid</p> Signup and view all the answers

    What kind of pattern does colorblindness exhibit in terms of gender susceptibility?

    <p>Male-specific</p> Signup and view all the answers

    What term describes a situation where someone who is heterozygous for a codominant trait will show both alleles?

    <p>Codominance</p> Signup and view all the answers

    What term refers to a section of DNA that is copied more in some individuals and less in others?

    <p>Copy-number variation</p> Signup and view all the answers

    In genetics, what is the term for traits that are influenced by genes not located on a sex chromosome but are expressed differently in males and females?

    <p>Sex-influenced trait</p> Signup and view all the answers

    Which term is used to describe a trait resulting from genes expressed in one sex but 'silenced' in the other?

    <p>Sex-limited trait</p> Signup and view all the answers

    What situation occurs when the phenotype of one gene is altered by the expression of a different gene in the same pathway?

    <p>Gene interaction</p> Signup and view all the answers

    Which term describes a scenario where a trait does not affect 100% of individuals with a particular genotype?

    <p>Incomplete penetrance</p> Signup and view all the answers

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