) What is the phenotypic proportion of the recombinant offspring? C) 45 A) 5 B)
ID: 265971 • Letter: #
Question
) What is the phenotypic proportion of the recombinant offspring? C) 45 A) 5 B) 10 E) 20 42) What is the phenotypic proportion of the parental or non-recombinant offspring? D) 90 A) 5 B) 10 45 43) What genotypes represent the recombinant offspring? 44) What genotypes represent the non-recombinant offspring? 45) After performing a cross in a unicellular eukaryote such as fungi, which group of spore D) ds E) B & C E) A & D arrangement would be considered non recombinants? C) tetratype TT A) parental ditype PD D) B and c B) non pa E) A and B rental ditypeNPD 46) After performing a cross in a unicellular eukaryote such as fungi, which group of spore arrangement would be considered recombinants from a single cross over event involving two chromatids out of the four chromatids? C) tetratype TT B) non parental ditype NPD E) A and B -A) parental ditype PD D) B and c 47) After performing a cross in a unicellular eukaryote such as fungi, which group of spore arrangement would be considered recombinants from double cross overs involving all four chromatids? -C) tetratype TT A) parental ditype PD D) B and C )A and B 48) What is the outcome of a cross between the bacteria strains Hfr x F? 49) What is the outcome of a cross between the bacteria strains F" x F? 50) A type of gene transfer system where bacteria take up fragments of DNA from the C) F- D) F E) none of the above A) Hfr D) F E) none of the above environment is A) Conjugation B) Transduction C)Transformation D)Anticipation E)Epigenetic 1) A type of gene transfer system when direct contact between donor and recipient bacteria A) Conjugation B)Transduction C)Transformation D)Anticipation E)Epigeneti occurs is.Explanation / Answer
Questions 41,42,43,44 cannot be solved as there is no backgroud data.
45. A.
The tetratype has 50% recombination. NPD has all recombinant chromosomes. Hence both these are recombinants.
46. C.
Tetra ttype will have 2 chromatids recombined out of 4. Tetra will have only 1 cross over event. NPD has all 4 recombined, with 2 cross over events. Parental has no recombined chromosomes.
47. B.
As explained above.
48. HFR x F- will give rise to hfr and f-. There is no real gain in such crosses.
49. F+ x F- = F+ . Option B.
50. Transformation. Here the environmental DNA fragments are randomly taken in.
Tranduction. Virus mediated gene transfer.
Conjugation: Mediated by a sex pilus, where donor and recipient come in contact with each other.
Epigenetics: Non nuclear chromosomal inheritance
51. Conjugation.
Reasons as explained above.
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