BIOL 3001 MIDTERM EXAM QUESTIONS
100% ANSWERED
, What are the learning objectives for Lab 1? - ANSWER- Understand the basic attributes
of Drosophila melanogaster
- Conduct crosses and collect progeny data using the fly portal
- Design and diagram monohybrid crosses
- Complete chi-squared analyses to compare observed versus expected traits
- Better understand the effects of different progeny number (sample size) on expected
ratios
modes of inheritance - ANSWERmanner in which a genetic trait or disorder is passed
from one generation to the next
How can the genders be distinguished in fruit flies? - ANSWER- Females are larger
than males.
- Females have a "knob" (ovipositor) on the tip of the abdomen.
- Males have a solid abdomen while females have stripes.
standard F1 cross - ANSWERcrosses offspring from the F1 Generation to each other
backcross - ANSWERperformed by crossing one of the F1 progeny back to one of the
original parents to produce the F2 generation
Mendel's Big Six - ANSWER- AA x AA --> Pure A
- aa x aa --> Pure a
- AA x aa --> Parental (P1)
- Aa x Aa --> F Cross
- Aa x aa --> Recessive Backcross
- Aa x AA --> Dominant Backcross
What is the difference between testcross and backcross? - ANSWERA test cross is an
experimental cross when an organism that has the dominant phenotype with an
unknown genotype is crossed with a homozygous recessive genotype (and phenotype).
A backcross is when an organism is crossed with one of its parents or another organism
genetically similar to one of its parents. A recessive backcross can also be a test cross.
Why are backcrosses useful? - ANSWERfor isolating (separating out) a specific trait in
a related population of organisms
What family, order, and class is Drosophila melanogaster classified in? -
ANSWERFamily: Drosophilidae
Order: Diptera (which also includes flies, mosquitoes and midges)
Class: Insecta (insects)
What does Drosophila (genus name) mean? - ANSWERdew-lover
What does melanogaster mean? - ANSWERblack abdomen
100% ANSWERED
, What are the learning objectives for Lab 1? - ANSWER- Understand the basic attributes
of Drosophila melanogaster
- Conduct crosses and collect progeny data using the fly portal
- Design and diagram monohybrid crosses
- Complete chi-squared analyses to compare observed versus expected traits
- Better understand the effects of different progeny number (sample size) on expected
ratios
modes of inheritance - ANSWERmanner in which a genetic trait or disorder is passed
from one generation to the next
How can the genders be distinguished in fruit flies? - ANSWER- Females are larger
than males.
- Females have a "knob" (ovipositor) on the tip of the abdomen.
- Males have a solid abdomen while females have stripes.
standard F1 cross - ANSWERcrosses offspring from the F1 Generation to each other
backcross - ANSWERperformed by crossing one of the F1 progeny back to one of the
original parents to produce the F2 generation
Mendel's Big Six - ANSWER- AA x AA --> Pure A
- aa x aa --> Pure a
- AA x aa --> Parental (P1)
- Aa x Aa --> F Cross
- Aa x aa --> Recessive Backcross
- Aa x AA --> Dominant Backcross
What is the difference between testcross and backcross? - ANSWERA test cross is an
experimental cross when an organism that has the dominant phenotype with an
unknown genotype is crossed with a homozygous recessive genotype (and phenotype).
A backcross is when an organism is crossed with one of its parents or another organism
genetically similar to one of its parents. A recessive backcross can also be a test cross.
Why are backcrosses useful? - ANSWERfor isolating (separating out) a specific trait in
a related population of organisms
What family, order, and class is Drosophila melanogaster classified in? -
ANSWERFamily: Drosophilidae
Order: Diptera (which also includes flies, mosquitoes and midges)
Class: Insecta (insects)
What does Drosophila (genus name) mean? - ANSWERdew-lover
What does melanogaster mean? - ANSWERblack abdomen
