Why are semi-synthetic penicillins more widely used instead of the natural penicillin g?

The several kinds of penicillin synthesized by various species of the mold Penicillium may be divided into two classes: the naturally occurring penicillins (those formed during the process of mold fermentation) and the semisynthetic penicillins (those in which the structure of a chemical substance—6-aminopenicillanic acid—found in all penicillins is altered in various ways). Because it is possible to change the characteristics of the antibiotic, different types of penicillin are produced for different therapeutic purposes.

Since a female is both xx chromosome and the male passes down the x chromosome, than the offspring would be female since a female is xx.

This is what i did 45-5=4040÷4=10so there are 10 white marbles but am not sure is just a question that am not sure