The genome of a living being is composed of DNA sequences with diverse origins. Beyond single-copy genes, whose product has a biological function that can be inferred by experimentation, certain DNA sequences, present in a large number of copies, escape the most refined approaches aimed at elucidating their precise role.
The existence of what 20th century geneticists had already perceived (and wrongly described as "junk DNA"!) was confirmed by the sequencing of the first complex genomes, including that of Homo sapiens. A large part of what defines a living thing is not unique, but repeated, sometimes a very large number of times, increasing in complexity with successive duplications and multiplication.
Understanding and defining the many functions of this myriad of repeated sequences, as well as their evolution through natural selection, has become one of the major challenges for 21st century genomics.
Płać wygodnie kartą, Klarną, Apple Pay lub Google Pay. Nie jesteś zadowolony? Zawsze masz 14-dniową gwarancję zwrotu pieniędzy. Więcej przeczytasz w naszych warunkach. Masz pytania? Napisz do nas na hello@memmo.org.
Memmo ułatwia naukę – gdziekolwiek jesteś na świecie. U nas znajdziesz podręczniki i sprytne narzędzia do nauki w jednym miejscu: streszczenia, quizy, podcasty i fiszki. A do tego Ted, Twój kumpel do nauki, który odpowie na wszystko, co Cię nurtuje. Ponad 50 000 studentów już tu się uczy – stworzone, byś uczył się szybciej i mniej stresował.