Gene conversion

1
Gene conversion
2
Double-strand break model
3
In the meiotic products of a Neurospora strain of
genotype m/m, which of the following linear
octads shows the occurrence of gene conversion?

• mmmm
• mmmm
• mmmm
• mmm
• mmmm

d. is correct 53 ratio typical of gene conversion
4
In Neurospora the a, b, and c loci are on the
same chromosome arm. Locus a is next to the
centromere, followed by loci b and c An F1
individual resulting from mating two strains of
genotypes AABBCC x aabbcc produces the following
ascospores in the order indicated ABC, ABC, ABC,
ABc, aBC, aBc, abc, abc

• What are the types of segregation for loci a, b
  and c?
• A 2nd div seg, B 1st div segr , C post meiotic
  seg
• A 1st div. seg, B 2nd div seg, C gene conversion
• A 1st div seg, B gene conv, C post meiotic seg
• A 1st div seg, B post meiotic seg, C gene conver

c. is correct, follow 1 gene a time