#Question id: 4928
#Unit 8. Inheritance Biology
A certain kind of snail can have a right-handed direction of shell coiling (D) or left handed coiling (d). If direction of coiling is due to a protein deposited by the mother in the egg cytoplasm, then a Dd egg-producing snail and a dd sperm-producing snail will have offspring of which genotype(s) and phenotype(s)?
#Question id: 4929
#Unit 8. Inheritance Biology
Maternal inheritance of coiling of shell in snail (limnaea peregra) is well established. The dextral coiling depends on dominant allele D and sinistral coiling depends upon recessive allele d. A female F1 progeny of dextral(Dd) type is crossed with a male dextral (Dd). What will be the phenotype ratio in progeny?
#Question id: 5239
#Unit 8. Inheritance Biology
Which of the following statements is not true for Hfr strains of E. coli ?
#Question id: 5240
#Unit 8. Inheritance Biology
If bacteria grow in the presence of a large amount of DNase, which of the following recombination process completely inhibited?
#Question id: 5241
#Unit 8. Inheritance Biology
Genes a, b, and c are widely spaced in the bacterial genome. Transducing phage from an a+ b+ c+ bacterium were used to infect a culture of a- b- c- cells, and b+ transductants were selected. Which of the following best describes the predicted genotypes of these transductants?
#Question id: 5242
#Unit 8. Inheritance Biology
Auxotrohic bacteria plating on different medium, it is observed that colonies grow on minimal plus threonine only, no colony on minimal plus leucine and no colonies grow on minimal medium cystein only. What are the actual genotypes of auxotroph?