Chromosomes 21 and 22 contain long stretches of repetitive DNA, which are unstable sites where rearrangements can occur. The sequencing of human chromosomes 21 and 22 showed that some regions of chromosomes do not code for proteins.
are unstable sites where rearrangements can occur
No - chromosomes contain genes. A chromosome is a long strand of DNA coiled up into the 'X' shape you see in textbooks/under a microscope. A gene is simply a section of DNA that codes for a protein. So a gene is simply a small piece of a chromosome. Sources: undergraduate studies in biology.
Well in eukaryotic cells each chromosome has a telomere on each end (to prevent it from unraveling), but I'm not 100% certain that these telomeres are identical although they contain very long repetitions of the same nucleotides. But in bacteria the chromosome is ring shaped and is all genes (there are no noncoding sequences, e.g. centromeres, telomeres, introns, pseudogenes, transposons) so there are no identical parts.
yes
A telomere is the structure at each end of a chromosome. It consists of an area of highly repeated DNA combined with protein. Its main function is to protect the end of the chromosome.Telomeres are instrumental in enabling the cells to divide and replicate. But as we grow older these tips wear out and shorten much like the shoelace caps. When they get too short, we get diseases and die. The three Nobel Prize winners found this as they were looking for a cure for cancer.
Chromosomes contain hundreds to thousands of genes in one very long strand of DNA. The DNA is coiled around proteins called histones. The DNA seems to form a bigger (of course on a very tiny level) part of the chromosome than the histones. Since DNA is comprised of genes, that means that over half of the chromosome is genes. The exact amount would depend on the chromosome.
True.
Africa is the only continent that does not contain a long, linear mountain range that stretches across the landmass.
A chromosome is a part of DNA that consists of a long arm and a short arm connected at the center called the Centromere.
It's called a Chromosome
The chromosome(s), which are made of the polymer deoxyribonucleic acid (DNA).
8 is the chromosome number, q means the long arm of the chromosome, and the 24 is the position on the long arm. It's like coordinates to find the position on the chromosome.
The structure in the nucleus that contains hereditary material is the chromosome. Chromosomes are long, organized structures that are made of deoxyribonucleic acid (DNA).
Chromosome
Before a volleyball game you should do various stretches, such as, lunges, leg stretches, arm stretches and foot stretches. You also HAVE TO stretch your arms before serving. If you don't you will pull an arm muscle and it will hurt for a long time.
i need help with it also
a chromosome
The 'q' refers to the long arm of the chromosome. A prototypical condensed chromosome has two arms: a short arm and a long arm. The 'p' stands for the French word 'petit' (which means small). The 'q' doesn't stand for anything in particular, but because 'q' comes after 'p' in the alphabet, it is used to refer to the long arm of the chromosome.