Bio 2100 Exam 3 Questions With Complete Solutions
Aneuploid Correct Answers abnormal chromosome number -
one extra or one missing
Autosomal dominant and recessive Correct Answers -Dominant
- only has one affected parent, occurs in every generation
-Recessive - both parents are carriers, not seen in every
generation
codominance Correct Answers -When both traits are fully
expressed
(Ex: vertical stripes + horizontal stripes = checkered)
Correctly apply the rules of multiplication and addition in
calculating probabilities Correct Answers and = multiply
or = add
Describe how Avery demonstrated that Griffith's transforming
factor is DNA Correct Answers -Transforming factor must be
what contians genes - wanted to define what it was
-Removed carbs and lipids from solution then tested by using
enzymes to remove
-Proteins from one (there was still transforming factor)
-RNA from one (there was still transforming factor)
-and DNA from another solution to see which still had
transformed benign to virulent in presence of killed virulent,
-It was DNA! (the only thing that inhibited transforming factor)
, Describe key features of Mendel's experimental model and the
characters that he studied Correct Answers -Discovered and
described the importance of inheritance
-Focused on physical characteristics that vary in one of two
forms (had one of two traits - purple of white flower color)
-Chose model organism (pea plant) because it reproduces
rapidly and could control breeding
-First looked at cross between homozygotes RR (purple) and rr
(white) and got only purple
-Then breed this Rr and Rr and found idea of dominance and
that some forms were present but masked
-Formed idea that alleles were in pairs that separated to make
gametes at equal frequencies.
-Breed YYRR and yyrr to get YyRr.
-Breed two heterozygotes and found 9:3:3:1 ratio meaning the
shape and color alleles separated independently of one another.
Describe why particular alleles of two different genes would not
assort independently Correct Answers -Alleles of two genes
may not sort independently if they are located on a single
chromosome
-They would form recombinations due to crossing over
depending on how close to one another (further apart =
independent) (close together = dependent)
Differences between meiosis and mitosis Correct Answers -
Mitosis is producing genetically 2 identical cells
-If there is a problem in us, in Mitosis we are the individual
affected
-Diploid (2n) chromosomes
Aneuploid Correct Answers abnormal chromosome number -
one extra or one missing
Autosomal dominant and recessive Correct Answers -Dominant
- only has one affected parent, occurs in every generation
-Recessive - both parents are carriers, not seen in every
generation
codominance Correct Answers -When both traits are fully
expressed
(Ex: vertical stripes + horizontal stripes = checkered)
Correctly apply the rules of multiplication and addition in
calculating probabilities Correct Answers and = multiply
or = add
Describe how Avery demonstrated that Griffith's transforming
factor is DNA Correct Answers -Transforming factor must be
what contians genes - wanted to define what it was
-Removed carbs and lipids from solution then tested by using
enzymes to remove
-Proteins from one (there was still transforming factor)
-RNA from one (there was still transforming factor)
-and DNA from another solution to see which still had
transformed benign to virulent in presence of killed virulent,
-It was DNA! (the only thing that inhibited transforming factor)
, Describe key features of Mendel's experimental model and the
characters that he studied Correct Answers -Discovered and
described the importance of inheritance
-Focused on physical characteristics that vary in one of two
forms (had one of two traits - purple of white flower color)
-Chose model organism (pea plant) because it reproduces
rapidly and could control breeding
-First looked at cross between homozygotes RR (purple) and rr
(white) and got only purple
-Then breed this Rr and Rr and found idea of dominance and
that some forms were present but masked
-Formed idea that alleles were in pairs that separated to make
gametes at equal frequencies.
-Breed YYRR and yyrr to get YyRr.
-Breed two heterozygotes and found 9:3:3:1 ratio meaning the
shape and color alleles separated independently of one another.
Describe why particular alleles of two different genes would not
assort independently Correct Answers -Alleles of two genes
may not sort independently if they are located on a single
chromosome
-They would form recombinations due to crossing over
depending on how close to one another (further apart =
independent) (close together = dependent)
Differences between meiosis and mitosis Correct Answers -
Mitosis is producing genetically 2 identical cells
-If there is a problem in us, in Mitosis we are the individual
affected
-Diploid (2n) chromosomes
