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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.

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are unstable sites where rearrangements can occur

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Q: Chromosome 21 and 22 contain long stretches of repetitive DNA which?
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Do genes contain chromosomes?

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.


When a chromosome is made of two identical parts are called?

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.


Does each chromosome have a very long DNA molecule with hundreds of thousands of genes?

yes


Purpose of a telomere?

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.


What percent of the DNA in your chromosomes functions as genes?

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.

Related questions

Chromosome 22 contains long stretches of DNA that do not code for proteins?

True.


What is the only continent that does not contain a long linear mountain range that stretches across the landmass?

Africa is the only continent that does not contain a long, linear mountain range that stretches across the landmass.


What does a chromosome contain?

A chromosome is a part of DNA that consists of a long arm and a short arm connected at the center called the Centromere.


What are long strands of nuclear material that contain DNA called?

It's called a Chromosome


What is a very long organic molecules that contain instructions that cells need to function called?

The chromosome(s), which are made of the polymer deoxyribonucleic acid (DNA).


What does the 24 in chromosome 8q24 mean?

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.


Structures in the nucleus that contain hereditary material?

The structure in the nucleus that contains hereditary material is the chromosome. Chromosomes are long, organized structures that are made of deoxyribonucleic acid (DNA).


Long strand found in the nucleus?

Chromosome


What are some special preparations for volleyball?

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.


What is the Long molecule in a chromosome?

i need help with it also


What do long strand of DNA in cells form?

a chromosome


What does the q in chromosome 8q24 mean?

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.