BIOL 3001 EXAM 2025 QUESTIONS AND
ANSWERS
Electrophoresis - ANS __________ is a series of techniques by which biomolecules can be
separated based on size, length and/or shape.
Electrophoresis Learning System - ANS You will be using a new computer program this week
called ELS which stands for ________ ________ _______.
Length - ANS The fragments of DNA we will be examining this week in lab will be separated
based on fragment _____________.
Denature the DNA into single strands. - ANS What is the primary purpose of heating your
samples prior to loading them to the gel?
autoradiography - ANS The final step in the ELS program is to "develop" your gel so that the
DNA fragments become visible. This technique uses a small amount of radioactive phosphorus
and is called ___________.
false - ANS The DNA fragments used in this will exhibit a very simple mode of inheritance,
which is Simple Mendelian.
1;2 - ANS Because of the simple mode of inheritance it will be very easy to distinguish
homozygotes from heterozygotes during this lab exercise. Homozygotes will all show _______
band(s) and heterozygotes will all show __________ band(s).
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, uncertainly exists in all scientific studies - ANS The Genotyping that we will be using in this
exercise provides us with an example of how science can help solve a problem. Genotyping also
provides us with another critical lesson, namely that ____________________.
Drosophila melanogaster - ANS The scientific (genus species) name for the fruitfly (or red-
eyed pomace fly) is?
8 - ANS Fruitflies have a total of _______ chromosomes.
XX, XY - ANS Fruit flies exhibit the Lygaeus Mode of Sex-determination. For each gender
below, give the correct chromosome assignment.
FEMALE ______
MALE ______
homozygous / homozygous - ANS For the Medelian option, the Fly Colony program is
designed so that the F1 progeny are all heterozygotes. This result simulates exactly what
happens if we were crossing real flies and occurs because one Parent is _________ dominant
while the other is selected to be _________ recessive.
93 - ANS A total of 372 offspring are produced. Some are red and some are blue. Given the
cross that you made, you expected a ratio of 3 red : 1 blue. How many blue offspring did you
expect from the 372 progeny? (please enter your answer numerically in whole numbers, no
decimals)
106 - ANS A total of 424 offspring are produced. Some are red and some are blue. Given the
cross that you made, you expected a ratio of 3 red : 1 blue. How many blue offspring did you
expect from the 424 progeny? (please enter your answer numerically in whole numbers, no
decimals)
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ANSWERS
Electrophoresis - ANS __________ is a series of techniques by which biomolecules can be
separated based on size, length and/or shape.
Electrophoresis Learning System - ANS You will be using a new computer program this week
called ELS which stands for ________ ________ _______.
Length - ANS The fragments of DNA we will be examining this week in lab will be separated
based on fragment _____________.
Denature the DNA into single strands. - ANS What is the primary purpose of heating your
samples prior to loading them to the gel?
autoradiography - ANS The final step in the ELS program is to "develop" your gel so that the
DNA fragments become visible. This technique uses a small amount of radioactive phosphorus
and is called ___________.
false - ANS The DNA fragments used in this will exhibit a very simple mode of inheritance,
which is Simple Mendelian.
1;2 - ANS Because of the simple mode of inheritance it will be very easy to distinguish
homozygotes from heterozygotes during this lab exercise. Homozygotes will all show _______
band(s) and heterozygotes will all show __________ band(s).
1 @COPYRIGHT THEBRIGHT 2025/2026
, uncertainly exists in all scientific studies - ANS The Genotyping that we will be using in this
exercise provides us with an example of how science can help solve a problem. Genotyping also
provides us with another critical lesson, namely that ____________________.
Drosophila melanogaster - ANS The scientific (genus species) name for the fruitfly (or red-
eyed pomace fly) is?
8 - ANS Fruitflies have a total of _______ chromosomes.
XX, XY - ANS Fruit flies exhibit the Lygaeus Mode of Sex-determination. For each gender
below, give the correct chromosome assignment.
FEMALE ______
MALE ______
homozygous / homozygous - ANS For the Medelian option, the Fly Colony program is
designed so that the F1 progeny are all heterozygotes. This result simulates exactly what
happens if we were crossing real flies and occurs because one Parent is _________ dominant
while the other is selected to be _________ recessive.
93 - ANS A total of 372 offspring are produced. Some are red and some are blue. Given the
cross that you made, you expected a ratio of 3 red : 1 blue. How many blue offspring did you
expect from the 372 progeny? (please enter your answer numerically in whole numbers, no
decimals)
106 - ANS A total of 424 offspring are produced. Some are red and some are blue. Given the
cross that you made, you expected a ratio of 3 red : 1 blue. How many blue offspring did you
expect from the 424 progeny? (please enter your answer numerically in whole numbers, no
decimals)
2 @COPYRIGHT THEBRIGHT 2025/2026
