Question

#5)

Q1) In Sordaria fimicola, ascospores are haploid and asci are diploid (True or False)

Q2) In Sordaria fimicola, 2-4-2 is a possible non parental pattern of the spore colors.

#6) The question refers to the cross between the wild type (g+t+) of Sordaria fimicola and its tan mutant (g+t)

Q1) The BBTT tetrad is one of the possible phenotypic pattern (True or False)

Q2) The expected frequencies of tan and black ascospores are both equal to 0.5 (True or False)

Answer 1

# 5

Q 1] Ans -- True [ The ascospores are produced when the diploid zygote nucleus divides by meiosis followed by a mitotic division ]

Q2] Ans -- Yes

# 6

Q 1] Ans -- True [ Three nuclear divisions are required to produce an ascus containing 8 haploid ascospores from a diploid nucleus. Meiosis 1 and 2 result in the production of 4 haploid ascospores. Next a mitotic division takes place to result in formation of 8 haploid ascospores. Crossing over of chromatids results in various types of combinations ]

Q 2] Ans -- True