Features of thanatophoric dysplasia include macrocephaly, narrow bell-shaped thorax, normal trunk length, and severe shortening of the limbs. Other features of this condition include a narrow chest, short ribs, underdeveloped lungs, and an enlarged head with a large forehead and prominent, wide-spaced eyes. Most affected infants die of respiratory failure shortly after birth.
7.2 .2 Explain the process of DNA replication in prokaryotes, including the role of enzymes (helicase, DNA polymerase, RNA primase and DNA ligase), Okazaki fragments and deoxynucleoside triphosphates. The explanation of Okazaki fragments in relation to the direction of DNA polymerase III action is required.
Basically, RNA polymerase's role is very similar to that of DNA polymerase. RNA polymerase is an enzyme that is used during transcription in the nucleus. Similar to DNA polyme â¦ rase, RNA polymerase codes for the complementary nucleotides to a DNA strand.