A scientist develops a computer model of gene expression. However, the model does not
include introns and exons. Which is the most likely result of a simulation that is based on
this model?
A Genes are not transcribed into mRNA.
B Pre-mRNA is not edited, and is used as mRNA.
C Transcription occurs normally, but some errors occur during translation.
D Transcription occurs normally, but mRNA is not translated into proteins.

In a classic experiment using pea shape, mendel conducted two separate genetic crosses. in the first cross the parent plants were “true breeding” for pea shape; one had round peas ( r )and the other had wrinkled (r). the first cross produced a filial 1 generation of all round peas. in the second cross, mendel bred plants from the filial 1 generation. this cross produced different results. out of approximately 1000 plants, about 75% were round and 25% were wrinkled.

In the diagram below, the northern hemisphere would be in what season at position a a.fall b. winter c.summer d.spring

Jason adds the antibiotic penicillin to a bacterial culture. the bacteria develop genetic modifications in their genome, which gives them resistance to the antibiotic penicillin. what caused this genetic modification?