Question

32. Streptococcus pneumoniae cells of genotype str mtl- are transformed by donor DNA of genotype strk mtlt and (in a separate experiment) by a mixture of two DNAs with genotypes strk mtl- and strs mtlt. The accompanying table shows the results.

Answer 1

The first row in table shows that strr is dominant gene whereas mtl+ is recessive and both genes are independent of each other. On transformation more cells with strr mtl- genes were present.

Whereas, in other environment strsmtl+ cells were present.