In mammals, the action of modifying gene expression in which one X chromosome is inactivated in the cell of females differs from how miRNA performs gene silencing in that

miRNA blocks transcription factors.
miRNA is a method of posttranscriptional gene silencing.
miRNA modifies histones on DNA.
miRNA methylates acetyl groups to repress translation.

This comparative chart is an example of one that might be used by scientists and law enforcement personnel for identification purposes. the chart represents a technological advance called

What is a sex-linked genetic disorder that disrupts the blood's ability to clot? a.achondroplasia b.huntington's disease c.hemophilia d.albinism

Zoo geographic regions are characterized by the presence of specific groups of animals these regions are determined by the taxonomic or phylogenetic relationships of animals. the map shows the zoogeographic regions proposed by the naturalist alfred russel wallace in 1876. the similarities of organisms in which two areas numbered above provide the best evidence for common ancestry between the organisms in both locations ?