Download Meiosis Poster Project - Mercer Island School District

Meiosis Poster Project
Your group will make a poster on one of the following topics:
Genetic Variation in Meiosis through Independent Assortment
Genetic Variation in Meiosis through Crossing Over
Be sure to use the correct set of directions for the poster topic your group is assigned.
Posters will be graded on content and neatness.
All group members must contribute to the posters.
Genetic Variation in Meiosis through Independent Assortment Poster Should Include:
 A title for your poster
 A paragraph explaining what independent assortment is and how it produces
genetic variation in the gametes (egg or sperm).
 Make a diagram of a cell undergoing meiosis to illustrate the two possible
outcomes through independent assortment (see directions below). The diagram
does not need to include every phase, just the starting parent cell and the
possible outcomes for the gametes produced.
 Label and include a definition of each of the following: a homologous pair, sister
chromatids and a centromere.
In your poster, show a starting cell which is a diploid cell containing two homologous
pairs of chromosomes, one pair which is longer and one pair which is shorter.
•
Use 4 different colors of yarn to represent the chromosomes in different
colors, but making the sister chromatids the same color.
•
Use stickers with letters to represent the different genes on the
chromosomes.
o The long homologous pair has the gene for flower color (R/r).
Long chromosome 1 has the red flower color gene form (R)
Long chromosome 2 has the white flower color gene form (r)
o The short homologous pair has the gene for plant height (T/t).
Short chromosome 1 has the tall gene form (T).
Short chromosome 2 has the short gene form (t).
o Remember to make sister chromatids identical (same gene form).
o Use pieces of clay to represent the centromeres.
o Show the 2 possible ways that the 2 pairs of chromosomes can
line up during independent assortment and label these two
possibilities as option 1 and option 2.
o Display the 4 possible gametes that can be produced from these
possible arrangements.
Genetic Variation in Meiosis through Crossing Over Should Include:
 A title on your poster
 A paragraph explaining what crossing over is and how it produces genetic
variation in the gametes (egg or sperm).
 Make a diagram of a cell undergoing meiosis to show the process of crossing
over. (See directions below.) Not every phase of meiosis needs to be included,
but show the parent cell, the process of crossing over and the possible
outcomes for the gametes produced.
 Label and include a definition of each of the following: a homologous pair, sister
chromatids and a centromere.
In your poster, show a parent cell which is a diploid cell containing one homologous pair
of chromosomes with two different genes labeled (G/g and R/r).
•
Use 2 different colors of yarn to represent the chromosomes in the pair
different colors, but making the sister chromatids the same color.
•
Use stickers with letters to represent the different genes on the
chromosomes.
o This chromosome has the genes for pod color (G/g) and seed
shape (R/r).
Chromosome 1 has the green pea pod gene form (G) and wrinkled
seed shape (r).
Chromosome 2 has the yellow pea pod gene form (g) and round
seed shape (R)
o Remember to make sister chromatids identical (same gene form).
•
Use pieces of clay to represent the centromeres.
•
In the gametes that are produced, use the different colors of yarn, as well
as the letter stickers to indicate the pieces of the chromosome that have
been exchanged. (The chromatid strands in which crossing over has
occurred will now be composed of two different colors).
Make a diagram showing:
o The starting cell during prophase I before crossing- over has
occurred.
o
The cell in the process of crossing over.
o The four gamete cells that would be produced- with different
colors of yarn for the two gametes that would have recombined
chromosomes due to crossing over.