1
BIOL 3001 MIDTERM EXAM QUESTIONS WITH
COMPLETE ANSWERS/NEWEST UPDATE
Pedigree - (answers)chart that shows the presence or absence of a trait according
to the relationships within a family across several generations
Complete Penetrance - (answers)The gene or genes for a trait are expressed in all
the population who have the genes
Incomplete Penetrance - (answers)the genetic trait is expressed in only part of the
population
3 assumptions when determining the mode of inheritance - (answers)1. The trait
displays Complete Penetrance.
2. The trait is considered Rare-in-Population.
3. The traits you examine are not Y-Linked.
Pedigree symbols: A transparent circle - (answers)Unaffected female
Pedigree symbols: A transparent square - (answers)unaffected male
Pedigree symbols: filled circle - (answers)affected female
Pedigree symbols: filled square - (answers)affected male
, 2
Pedigree symbols: diamond - (answers)gender not specified
Pedigree symbols: line through square, circle, or diamond - (answers)deceased
individual
Pedigree symbols: have filled square or circle - (answers)carrier individual (usually
heterozygous)
Pedigree symbols: two shapes branching from the same node - (answers)dizygotic
twins
Pedigree symbols: two shapes branching from the same node with extra line
connecting them - (answers)monozygotic twins
Pedigree symbols: black arrow pointing to square, circle, or diamond on tree -
(answers)proband: individual who prompted pedigree
Pedigree symbols: Brackets around an individual - (answers)adopted individual
Patterns that indicate autosomal recessive trait - (answers)- both parents of the
affected individual must be unaffected
-the trait skips a generation or it may disappear and reappear across generations
BIOL 3001 MIDTERM EXAM QUESTIONS WITH
COMPLETE ANSWERS/NEWEST UPDATE
Pedigree - (answers)chart that shows the presence or absence of a trait according
to the relationships within a family across several generations
Complete Penetrance - (answers)The gene or genes for a trait are expressed in all
the population who have the genes
Incomplete Penetrance - (answers)the genetic trait is expressed in only part of the
population
3 assumptions when determining the mode of inheritance - (answers)1. The trait
displays Complete Penetrance.
2. The trait is considered Rare-in-Population.
3. The traits you examine are not Y-Linked.
Pedigree symbols: A transparent circle - (answers)Unaffected female
Pedigree symbols: A transparent square - (answers)unaffected male
Pedigree symbols: filled circle - (answers)affected female
Pedigree symbols: filled square - (answers)affected male
, 2
Pedigree symbols: diamond - (answers)gender not specified
Pedigree symbols: line through square, circle, or diamond - (answers)deceased
individual
Pedigree symbols: have filled square or circle - (answers)carrier individual (usually
heterozygous)
Pedigree symbols: two shapes branching from the same node - (answers)dizygotic
twins
Pedigree symbols: two shapes branching from the same node with extra line
connecting them - (answers)monozygotic twins
Pedigree symbols: black arrow pointing to square, circle, or diamond on tree -
(answers)proband: individual who prompted pedigree
Pedigree symbols: Brackets around an individual - (answers)adopted individual
Patterns that indicate autosomal recessive trait - (answers)- both parents of the
affected individual must be unaffected
-the trait skips a generation or it may disappear and reappear across generations
