MBG*2040 Midterm Lecture 1: Fundamentals of Heredity Review
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Questions and Answers

What is the name of the father of genetics?

  • Charles Darwin
  • Louis Pasteur
  • Thomas Edison
  • Gregor Johann Mendel (correct)

What is the term for the first law proposed by Mendel?

  • Complete Dominance
  • Incomplete Dominance
  • Independent Assortment
  • Segregation (correct)

Which type of trait shows an intermediate phenotype in incomplete dominance?

  • AA
  • BB
  • bb
  • Bb (correct)

What term describes the situation where both alleles in a heterozygote are fully expressed?

<p>Co-dominance (C)</p> Signup and view all the answers

For rare and dominant traits, affected individuals are most likely to be:

<p>Heterozygous (Bb) (D)</p> Signup and view all the answers

What term describes traits where individuals with the genotype Bb show a mix of phenotypes of the homozygous genotypes?

<p>Incomplete Dominance (A)</p> Signup and view all the answers

What term is used to describe the proportion of individual organisms having a particular genotype that expresses the expected phenotype?

<p>Penetrance (D)</p> Signup and view all the answers

Which factor refers to the degree to which a phenotype is expressed, ranging from mild to severe?

<p>Expressivity (C)</p> Signup and view all the answers

What is the term for the range of phenotypes expressed by a single genotype under different environmental conditions?

<p>Norm of reaction (A)</p> Signup and view all the answers

In a dihybrid cross, what is the phenotypic ratio for recessive epistasis?

<p>9:7 (D)</p> Signup and view all the answers

What type of allele produces dark fur at the extremities of a rabbit's body based on temperature sensitivity?

<p>Temperature-sensitive allele (B)</p> Signup and view all the answers

Which term describes the masking of the expression of one gene by another, resulting in no new phenotypes?

<p>Epistasis (B)</p> Signup and view all the answers

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