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Meiosis
Takes a diploid nucleus and reduces it to 4 haploid nuclei
TERM 2
Haploid
DEFINITION 2
One set of chromosomes
TERM 3
Diploid
DEFINITION 3
Two sets of chromosomes
TERM 4
Homologous Chromosomes
DEFINITION 4
copies of chromosomes made of the same information
TERM 5
Recombinant
DEFINITION 5
new chromosome combination that is different from what
was in the parent chromosomes
In what phase do the homologous
chromosomes pair up and crossing over
occurs?
Prophase I
TERM 7
When does independent assortment of
homologous occur?
DEFINITION 7
Metaphase I
TERM 8
When do the homologues separate and move
toward opposite poles?
DEFINITION 8
Anaphase I
TERM 9
Are the resulting nuclei diploid or haploid at
the end of Meiosis 1?
DEFINITION 9
Haploid
TERM 10
Are they replicated or unreplicated?
DEFINITION 10
Replicated
What lab was used for
Meiosis?
Sardoria fimicola
TERM 17
What event and which phase of Meiosis I
would cause the reversal of colors about 50%
of the time?
DEFINITION 17
Independent Assortment in Metaphase I
TERM 18
How do you find the "% Recombination"?
DEFINITION 18
[# of recombinants/(# of recombinants + # of
nonrecombinants)] x 100 / 2
TERM 19
How do you find the "# of recombinants"?
DEFINITION 19
# of (2:4:2) + # of (2:2:2:2)
TERM 20
How do you find the "# of nonrecombinants"?
DEFINITION 20
# of (4:4)
(4:4) - 195, (2:4:2) - 146, (2:2:2:2) - 139, Total
Asci - 480... How did you get %
recombinants?
Add 2:4:2 and 2:2:2:2. (146+139 = 285) Add 4:4 to the total.
( 285+195 = 480) Divide 285 by 480. (0.593) Multiply 0.
by 100. (59.3) Divide 59.3 by 2. (29.65) % Recombinants =
TERM 22
What are two ways genetic variability is
introduced during Meiosis?
DEFINITION 22
Crossing over and random alignment in Prophase I
TERM 23
In Sardoria, what were the haploid daughter
cells at the end of Meiosis/Mitosis called?
DEFINITION 23
Ascospores
TERM 24
What is the sac that hold them
called?
DEFINITION 24
Asci
TERM 25
Why are there 8 of them?
DEFINITION 25
Mitosis produces a copy of each cell after Meiosis makes 4
cells
