Download Meiosis - Aurora City Schools

Genetics and Molecular Biology
JEOPARDY!! 
Potpourri
Meiosis
Meiosis
Genetics 1
Genetics 2
10
20
30
40
50
10
20
30
40
50
10
20
30
40
50
10
20
30
40
50
10
20
30
40
50
10 Potpourri
Phenotype is always determined
by…
10
Potpourri
Genotype
20 Potpourri
If both alleles show up in the
phenotype of the heterozygote, they
are…
20
Potpourri
Codominant
30 Potpourri
When a mutation occurs on a single
chromosome, it’s called…
30 Potpourri
Aneuploidy
30 Community 1
40 Potpourri
When genes are placed in the
reverse order on a chromosome, this
is called…
40 Potpourri
An inversion.
50 Potpourri
Living things obtain genetic
diversity by…
50
Potpourri
*crossing over during prophase 1
*random orientation of
*chromosomes during metaphase 1
*sexual reproduction
10
Meiosis
When does crossing over occur and
why?
10
Meiosis
*Prophase 1 when homologous
chromosomes undergo synapsis
and form a tetrad
*for genetic diversity in gametes
20
Meiosis
What are the products of meiosis?
20
Meiosis
*4 genetically different haploid
cells
*Sperm/egg cells (gametes)
30
Meiosis
Why do homologous chromosomes
pair up during prophase 1 of meiosis
but never in mitosis?
30
Meiosis
*To reduce the number of
chromosomes (stays the same in
mitosis)
*to enable crossing over to occur
(stays the same in mitosis)
40
Meiosis
What is the law of segregation?
40
Meiosis
*separation of chromosomes
during anaphase 1 of meiosis.
*ensures gametes only have one
copy of each allele
50
Meiosis
What is the law of independent
assortment?
50
Meiosis
Chromosomes with different
alleles sort independently along
the metaphase plate of meiosis
1.
10 Meiosis
What term is used to
describe
chromosomes that
carry the same genes,
just different versions
of those genes?
10
Meiosis
Homologous Chromosomes
20
Meiosis
When do homologous chromosomes
pair up? What happens as a results?
20
Meiosis
Prophase 1- synapsis occurs, a
tetrad forms, enabling
crossing over.
30
Meiosis
What is required before meiosis can
occur?
30
Meiosis
*DNA replication in a
diploid cell.
40
Meiosis
Identify the phase of meiosis and explain.
40
Meiosis
Anaphase 1;
*homologous chromosomes separate
into individual chromosomes (sister
chromatids)
*cell is now haploid
50
Meiosis
A cat has a diploid number of 38.
What would the number of chromosomes
be in a cell in telophase 1 of meiosis in
this cat? What would it look like?
What would the number of chromatids be
in a cell in telophase 2 of meiosis in this
cat? What would it look like?
50
Meiosis
1.19, X
(two sister chromatids)
2. 19, |
(one half of a chromosomes,
individual chromatid)
10
Genetics 1
Colorblindness and
hemophilia are examles of…
10
Genetics 1
Sex-linked, recessive
traits
20
Genetics 1
The allele that is
expressed in the
phenotype is
referred to as ….
20
Dominant
Genetics 1
30
Genetics 1
After mating a brown
bunny with a white bunny,
the offspring are all brown.
What are the genotypes of
the parents? The offspring?
30
Parents- BB X bb
Offspring- Bb
Genetics 1
40
Genetics 1
Since each pair of alleles
segregate separately from
other pairs of alleles, Mendel
created…
40
Genetics 1
*The Law of Independent
Assortment
*supported by
homologous chromosome
random sorting during
metaphase 1 of meiosis.
50
Genetics 1
Because alleles separate when
homologous chromosomes
split in anaphase 1 of meiosis,
this supports Mendel’s…
50
Genetics 1
Law of Segregation
10 Genetics 2
My name is Bond, Ionic Bond;
Taken, not shared!
10 Population Growth
From: Mariano Cecowski
<MCecowski#NoSpam.sif.com.ar>
Q: if both a bear in Yosemite and one in
Alaska fall into the water
which one disolves faster?
A: The one in Alaska because it is
HIJKLMNO
10 Population Growth
Alimentary: What Sherlock Holmes said to Dr. Watson.
Urinate: What a nurse would say if a patient asked her what room
he's in.
Urine - The opposite of "You're out!"
Benign: What we want when we are eight.
Intestine - Currently taking an exam
CARDIOLOGY: advanced study of poker playing
TERMINAL ILLNESS: getting sick at the airport
10
Genetics 2
Mendel discovered that a
dihybrid cross between
parents heterozygous for
both traits will always show
what kind of phenotypic
ratio?
10
9:3:3:1
Genetics 2
10
Genetics 2
20
Genetics 2
To determine the genotype
of a dominant trait, you can
mate this individual with…
20
Genetics 2
An individual homozygous
recessive for the trait (called a
test cross)
30
Genetics 2
When both alleles are
expressed in an offspring,
this is called…
30
Genetics 2
*codominance
30
Genetics 2
40
Skin color is
an example
of….
Genetics 2
40
Genetics 2
Polygenic Inheritance
50
Genetics 2
The Chromosome Theory of
Inheritance states…
50
Genetics 2
It’s the behavior of
chromosomes during
meiosis and fertilization
that accounts for
inheritance patterns.