0
Actually the genes on a chromosome closest to the telomeres are the most unstable because they can unravel.
Wiki User
∙ 9y ago
Add your answer:
Earn +20 pts
How does DNA change as you age?
Answer 1All DNA, somatic and germ line, mutates at an average rate in humans. So, one picks up deletions, neutral base pair mutations and even more serious frame shift mutations. All mutations are just a discrepancy, copying error, in the DNA replication.Answer 2Another important change progressing with age is the length of the telomeric sequences. Telomeric sequences (which, if I am remembering correctly, is made up of something akin to LTR, or long, terminal repeat sequences) are sequences of nucleotide basepairs at the ends of the chromosomes. They do not code for proteins, but 'tie together' the ends of the molecular huge double helix that is a chromosome, and presumably play some role in preventing the random fusion of separate chromosomes. With each cell mitotic division in somatic tissues, a chromosome may lose a part of its telomeric sequences. If no telomeric bands remain, a chromosome may start to 'unravel', leading to apoptosis, the self-destruction of the cell. It is speculated that the loss of telomeric sequences plays some part in the aging process.
Chromosome 21 and 22 contain long stretches of repetitive DNA which?
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.
Is an x chromosome and chromosome the same thing?
An x chromosome is specifically a feminine chromosome. With a x and y chromosome its male, with a x and x, it is a female.
Which chromosome contains the sex gene?
chromosome 1 chromosome 1
Is a solution stable or unstable?
unstable
What does deletion chromosome consists of?
There is no 'deletion chromosome'. You mean chromosome deletion, and it is a phenomenon where a chromosome disappears from cell's genetic layout.
What chromosome does tay-sachs disease affect?
chromosome 17 The correct answer is chromosome 15
What are the unstable element?
Radioactive elements are unstable, and the shorter the half-life, the more unstable they are.
What is an antonym for chromosome?
Chromosome does not have an antonym.
Does an x chromosome looks the same as a y chromosome?
No. An 'X' chromosome looks like an 'X'. The 'Y' chromosome looks like a deformed 'X'. It is noticeably different to an 'X' chromosome. Also, the 'Y' chromosome is only a third of the size of an 'X' chromosome - an 'X' chromosome is 155 million base pares, while the 'Y' chromosome is only 58 million base pairs.
At the beginning of cell division DNA and the proteins associated with the DNA coil into a structure called an?
chromosome.
Illustration of metacentric chromosome?
A metacentric chromosome is one in which the centromere is located in the center of the chromosome.
