1. Sordaria Genetics Activity

2. Sordaria Life Cycle

3. Sordaria Reproduction & Genetics
Haploid for most of the life cycle & exists in a mass called the mycelium (“body” of fungus)
Ascospores (haploid)  mycelium  forms fungal filaments (hyphae)  2 hyphae fuse (diploid zygote)  meiosis  ascospores
Spore color gene: black or tan
Cross: black (wild-type) X tan (mutant)
Calculate distance from spore color gene to centromere

4. Noncrossover Asci

5. Crossover Asci

6. Calculating Color Gene to Centromere Distance
# Noncrossover Asci
# Crossover Asci
Total # Asci
Calculate recombination frequency
# crossovers/ total #
Corrected value: % recombination ÷ 2
Map distance from gene to centromere
Mitosis event after meiosis  2 asci formed

7. Analysis
Published results: 26 map units