Sum up the paragraph below on the discoveries of Leland Hartwell in 1 or 2 lines in different words?
Leland Hartwell is awarded for his discoveries of a specific class of genes that control the cell cycle. One of these genes called "start" was found to have a central role in controlling the first step of each cell cycle. Hartwell also introduced the concept "checkpoint", a valuable aid to understanding the cell cycle.
We editors at enotes are not in place to write paragraphs, essays, etc for students. Rather, we are at your disposal to offer our advice and encouragement in learning. So, with that having been said, let us regard the passage that you are to summarize in one or two lines.
When summarizing sentences, the reader certainly wants to be attentive to the main words such as the nouns and the verbs that act as the predicates of the sentences. Putting passages into one's own words involves using accurate synonyms for nouns and varying the sentence structures without changing meanings. For instance, the first sentence about Leland Hartwell can be changed by starting the sentence with a participial phrase; then the second sentence can be incorporated into the first since only a two sentence summary is required. The use of "start" as an appositive after the word gene in the first sentence should help. Something like this for the first sentence:
Having been awarded for his discoveries of a specific class of genes, --------------,Leland Hartwell has also --------
Hope this helps.