Consider an experiment in which an Hfr strain of E. coli bacteria with the StrS, his+, met+ alleles in its genome is mixed with an F- strain of E. coli with the StrR, his-, and met- alleles in its genome. After the cells have been cultured together for 8 hours, the mixture of cells is plated on minimal media containing Streptomycin.
1. Which genotype do you expect to be most common among the colonies that grow?
O F+: StrR, his+ and met+
O F-: StrR, his- and met-
O Hfr: StrR, his+ and met+
O F-: StrR, his+ and met+
O F+: StrR, his- and met-

F-: StrR, his+ and met+

Explanation:

Since it is stated that the minimal media contains Streptomycin, therefore:

a.) To be able to grow on this media, the E. coli genome must have StrR allele.

b.) Also remember that only prototrophs can grow on minimal media, thus colonies with mis+ and met+ (which are prototroph) will be the common growth .

c.) In the conjugation of F- strain with an Hfr strain,  F- which contains  the StrR allele do not and cannot form F+ or Hrf strains but remains F-

we would need to see the picture to answer it

igneous rocks which formed by the crystallization of magma at the surface of the earth called extrusive rocks. they are characterized by fine-grained textures because the rapid cooling at or near the surface did not provide enough time for large crystals to grow.