Sentences with phrase «only near genes»

A yeast retrotransposon called Ty3, the researchers have found, is especially judicious: it always inserts itself in safe places, outside genes rather than inside them, and only near genes of which a yeast cell has many copies.

Not exact matches

For example, the Antarctic icefish, a pale, near - transparent inhabitant of the frigid South Atlantic Ocean, has not only lost its ancestors» power to make oxygen - binding red hemoglobin (which it does not need in the cold oxygen - rich waters) but the two genes that code for hemoglobin have also gone extinct: one has disappeared, and the other remains as a non-coding «molecular fossil,» a useless remnant that hints at past use but still resides in the icefish DNA.

Prior to this work, a long - held view was that the distribution of genes in the genomes of barley, wheat and their relatives is such that the gene - dense regions are only out near the ends of chromosomes where there is also a high rate of recombination.

Some of these SNPs had previously been associated with different diseases and are located near «imprinted» genes — genes in which only the maternally or paternally inherited copy is «switched - on» to encode a protein.