Question

In Sordaria fimicola, ascospores are haploid and asci are diploid. (True or false)

In Sordaria fimicola, 2-4-2 is a possible non parental pattern of the spore colors. (True or false)

This question refers to the cross between the wild type (g+t+) of Sordaria fimicola and its grey mutant (gt+).

Q1) The BBGB tetrad is one of the possible phenotypes. (True or false)

Q2) The expected frequencies of grey and black ascospores are expected to be both 0.5 (True or false)

Answer 1

1) The given statement is true.

The ascospores are haploid and produced when the diploid zygote(asci) divides by meiosis followed by a mitotic division.

2) The given statement is true.

Yes,2-4-2 is a possible non parental pattern of the spore colors in Sordaria fimicola.If a crossover event occurs and two genes do not segregate until meiosis II which results in 2-4-2 pattern of ascospores.

3) The given statement is false, because it has BBGB tetrad combination, but this combination is not produced in this cross.

4) The given statement is true.