Crosses are carried out between a bacterial F- strain and three different Hfr strains. In these strains, it takes 60 minutes for an Hfr strain to transfer the entire chromosome. Below are the data generated from interrupted mating experiments. Time of transfer of different genes (in minutes) is given for each strain. Appearance of genes in F- cells Hfr1: Genes b+ d+ c+ f+ g+ Time 3 5 16 27 59 Hfr2: Genes e+ f+ c+ d+ b+ Time 6 24 35 46 48 Hfr3 Genes d+ c+ f+ e+ g+ Time 4 15 26 44 58 Based on these data, you could conclude that Group of answer choices b is between g and d and is 4 minutes from g e is between f and g and is 25 minutes from g g is between e and b and is 24 minutes from e none of these is correct d is between b and c and is 10 minutes from b
Bacterial Genomics
The study of the morphological, physiological, and evolutionary aspects of the bacterial genome is referred to as bacterial genomics. This subdisciplinary field aids in understanding how genes are assembled into genomes. Further, bacterial or microbial genomics has helped researchers in understanding the pathogenicity of bacteria and other microbes.
Transformation Experiment in Bacteria
In the discovery of genetic material, the experiment conducted by Frederick Griffith on Streptococcus pneumonia proved to be a stepping stone.
Plasmids and Vectors
The DNA molecule that exists in a circular shape and is smaller in size which is capable of its replication is called Plasmids. In other words, it is called extra-chromosomal plasmid DNA. Vectors are the molecule which is capable of carrying genetic material which can be transferred into another cell and further carry out replication and expression. Plasmids can act as vectors.
Crosses are carried out between a bacterial F- strain and three different Hfr strains. In these strains, it takes 60 minutes for an Hfr strain to transfer the entire chromosome. Below are the data generated from interrupted mating experiments. Time of transfer of different genes (in minutes) is given for each strain.
Appearance of genes in F- cells
| Hfr1: | Genes | b+ | d+ | c+ | f+ | g+ |
| Time | 3 | 5 | 16 | 27 | 59 | |
| Hfr2: | Genes | e+ | f+ | c+ | d+ | b+ |
| Time | 6 | 24 | 35 | 46 | 48 | |
| Hfr3 | Genes | d+ | c+ | f+ | e+ | g+ |
| Time | 4 | 15 | 26 | 44 | 58 |
Based on these data, you could conclude that
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