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BIOL 3001 MIDTERM EXAM QUESTIONS WITH COMPLETE ANSWERS!!

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Pedigree - ANSWERchart that shows the presence or absence of a trait according to the relationships within a family across several generations Complete Penetrance - ANSWERThe gene or genes for a trait are expressed in all the population who have the genes Incomplete Penetrance - ANSWERthe genetic trait is expressed in only part of the population 3 assumptions when determining the mode of inheritance - ANSWER1. 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 - ANSWERUnaffected female Pedigree symbols: A transparent square - ANSWERunaffected male Pedigree symbols: filled circle - ANSWERaffected female Pedigree symbols: filled square - ANSWERaffected male Pedigree symbols: diamond - ANSWERgender not specified Pedigree symbols: line through square, circle, or diamond - ANSWERdeceased individual Pedigree symbols: have filled square or circle - ANSWERcarrier individual (usually heterozygous) Pedigree symbols: two shapes branching from the same node - ANSWERdizygotic twins

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BIOL 3001 MIDTERM EXAM QUESTIONS
WITH COMPLETE ANSWERS!!

, Pedigree - ANSWERchart that shows the presence or absence of a trait according to
the relationships within a family across several generations

Complete Penetrance - ANSWERThe gene or genes for a trait are expressed in all the
population who have the genes

Incomplete Penetrance - ANSWERthe genetic trait is expressed in only part of the
population

3 assumptions when determining the mode of inheritance - ANSWER1. 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 - ANSWERUnaffected female

Pedigree symbols: A transparent square - ANSWERunaffected male

Pedigree symbols: filled circle - ANSWERaffected female

Pedigree symbols: filled square - ANSWERaffected male

Pedigree symbols: diamond - ANSWERgender not specified

Pedigree symbols: line through square, circle, or diamond - ANSWERdeceased
individual

Pedigree symbols: have filled square or circle - ANSWERcarrier individual (usually
heterozygous)

Pedigree symbols: two shapes branching from the same node - ANSWERdizygotic
twins

Pedigree symbols: two shapes branching from the same node with extra line connecting
them - ANSWERmonozygotic twins

Pedigree symbols: black arrow pointing to square, circle, or diamond on tree -
ANSWERproband: individual who prompted pedigree

Pedigree symbols: Brackets around an individual - ANSWERadopted individual

Patterns that indicate autosomal recessive trait - ANSWER- both parents of the affected
individual must be unaffected

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