Genes for histones seem to have no introns.
对
举一反三
- Although spliceosomal introns seem to be limited to eukaryotes, the other three intron classes are not. Genes with group I and II introns have now been found in both bacteria and bacterial viruses.
- I __________ have caught a cold. A: seem B: look C: seem to D: seem like
- Yeast mutants that are defective in their ability to complete cell division have led to the discovery of many genes that control the cell-division cycle—the so-called Cdc genes—and have provided a detailed understanding of how these genes, and the proteins they encode, actually work.
- If two genes from a parent cell are on the same chromosome, which of the following best explains why the daughter cells may not have the same alleles as the parent for both genes? A: they are linked genes B: they are unlinked genes C: crossing-over D: genetic mutation
- What effect does eating genetically modified foods have on your genes （） A: It could cause your own genes to mutate B: It could cause your own genes to absorb the excess genes C: It has no effect on your genes D: The effects on human genetics aren't known
内容
- 0
People seem to have deep instincts for fairness, empathy and _________
- 1
Eukaryotic genes have additional steps and more regulatory binding sites controlled by more regulatory proteins. Besides, nucleosomes and their modifiers influence genes expression.
- 2
Scientists in China have managed to crossbreed the cabbage and _____ genes together to create a cabbage.
- 3
What effect does eating genetically modified foods have on your genes?
- 4
--- You seem to have learned all the English words by heart.---___________ .