Snurfle Meiosis
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Click on Snurfle Meiosis App
Click on Continue
Click on Continue
Click on Meiosis and Genetics Interactive and follow directions as you answer the following
questions.
When does interphase occur? before it starts
What occurs during interphase? The making of proteins and normal cell activities
Uncoiled stringy DNA is called chromatin
.
Human cells have 46
pieces of chromatin.
Half of you DNA comes from your dad
and half from your mom
.
DNA has genes
that determines traits of an organism.
Different forms of a gene are called alleles
.
What are the 2 alleles for fur color in Snurfles and which letters represent those alleles?
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replication
is when DNA copies itself and it occurs during interphase
are made during Meiosis. Examples of gametes are sperm
gametes
Meiosis occurs in 2
divisions, Meiosis l and Meiosis ll
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List the phases for Meiosis I.
.
and
eggs
.
prophase l, metaphase l, anaphase l, telophase l
13. List the phases for Meiosis II.
Prophase ll, metaphase ll, anaphase ll, telophase ll
14. During prophase I the chromosomes condense
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and become visible
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homologous
Chromosomes that are the same size and have the same genes are called
.
sister
chromaitd
Each half of a replicated chromosome is called a
.
Sister chromatids of a chromosome are identical
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disintegrates
The nucleus
during prophase I.
Homologous chromosomes pair up during prophase I to form a tetrad
.
equater
During metaphase I the tetrads line up in the
of the cell.
The homologous chromosomes split up and move toward the opposite ends of the cell during
anaphase l
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two
independent cells begin to form during telophase
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cytokinesis
is the division of the cytoplasm to make two new cells.
The 2 new cells that are formed from Meiosis I are haploid
because they contain half of the
chromosome of the original cell that started meiosis.
At the start of Meiosis I you had 1 diploid
cell.
Meiosis II must take place because each of our new cells still has too much DNA
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Draw the chromosomes in Meiosis I. Label the cells as diploid or haploid
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The nucleus
during prophase II.
In Metaphase II the chromosomes line up single file down the
of the cell.
In
the sister chromatids split up.
In Telophase II,
daughter cells are being formed. They are called
Each newly formed cell will form a
around the chromosomes.
The chromosomes
to form
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occurs at the same time at Telophase II.
At the end of Meiosis II you have made
gametes (sex cells).
Draw and label the Meiosis summary.
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If the gametes are produced by a female, they are called
or
.
If the gametes are produced by a male, they are called
.
The
square is a tool that is used to predict the possible offspring of a genetic cross.
The letters on a punnett square actually represent possible
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When sperm and egg join it is called
.
A fertilized egg is called a
.
g
G
Complete the punnett square to the right.
G
A
is the genetic make-up of an organism.
Give examples of genotypes.
g
A
is the characteristic or appearance of the organism.
Give examples of phenotypes.
Dominant alleles are represented by
letters.
Recessive alleles are represented by
letters.
alleles will show in your phenotype even if it only has one copy.
For recessive traits to show in the phenotype the snurfle will need
copies of the gene.
means an organism has 2 copies of the same allele in its genotype (GG, gg)
means an organism has 2 different alleles in its genotype (Gg, Tt, Rr)
 Click on The Chromosome Quandary and follow the directions
 Click on The Meiosis and Genetics Quiz! Answer the questions.
 Click on Score Sheet. Record Scores. Overall Score:
___ Meiosis and Genetics: _____
Chromosome Quandary: ________ Quiz: _______ Teacher’s Initials: _________
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