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Sordaria Demonstration Cross Plate, Living
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Corn Segregating Ear, R and Su Alleles 9:3:3:1
Sordaria Demonstration Cross Plate, Living
Carolina Teacher Tips
QUESTION:
How do I know when my
Sordaria
plate is ready to use?
ANSWER:
Use a wooden toothpick to scrape a few perithecia from the plate periphery, where the 2 strains have grown together. Place the perithecia on a microscope slide, add a drop of water, and gently press down on them with a coverslip. The perithecia should break open with gentle pressure and you should see asci with spores (they resemble bubblegum balls in a wrapper). You should also see a color difference between the 2 spore types in their crossover arrangement.
Here are some signs the
Sordaria
asci
are not ready to be used:
You use a lot of pressure to break open the perithecia (the black spheres).
The spores are greenish in color.
You only see darl, sac-like perithecia and no asci with spores.
If the culture is not ready, continue to incubate the plate at 25° C (77° F) and repeat the testing process until the asci mature and rupture easily on the slide. If the culture is still not ready on Friday, the plate can be refrigerated over the weekend. Allow the plate and culture to come to room temperature before rechecking on Monday.
Intermediate
- Easy to perform; requires some basic training in microbiology.
A cross of
Sordaria fimicola
wild type and the mutant tan strain for demonstrating genetic crossing-over. For use with Advanced Placement® Biology Laboratory #3 or as a separate refresher demonstration from the exercises found in our
Sordaria
genetics kits (item# 155847 and item# 155848).
IMPORTANT SHIPPING INFORMATION:
This culture takes a week to prepare and leaves our warehouse on the
second Friday after your order.
It will arrive
Tuesday
of the
following week.
Please disregard the Arrival Date in your Shopping Cart, as we will automatically ship this culture on the second Friday after your order date
Item #
Product
Qty
Price
155846
Sordaria Demonstration Cross Plate, Living
$23.15
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We offer three convenient shipping methods to meet your timeline:
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Note that living and perishable materials automatically ship via 2nd Day Air and will arrive on the date(s) you select in your Shopping Cart.
Sordaria Genetics Class BioKit (with Prepaid Coupon)
$106.55
Sordaria Genetics Kit (with Prepaid Coupon)
$67.20
AP Biology Lab 3: Mitosis and Meiosis 8-Station Kit (with Prepaid Coupon)
$268.00
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