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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.
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
What are the name of 23 chromosomes in human body?
No, there are 46 chromosomes in one cell. A gamete, or sex cell, has 23 chromosomes because during fertilization, the female and male gametes (egg and sperm, respectively) come together to form a new cell with 46 chromosomes
Chromosome 21 and 22 contain long stretches of repetitive DNA which?
do not code for proteins but are important for gene regulation and chromosome structure. These repetitive DNA sequences can vary in length among individuals and are associated with genetic disorders such as Down syndrome when present in abnormal amounts. They play a role in chromosomal organization and stability.
What is the designation for the short arm of a chromosome?
Chromosome # + pso the short arm of Chromosome 11 is referred to as 11p
What are the unstable element?
Radioactive elements are unstable, and the shorter the half-life, the more unstable they are.
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.
4 chromosome mutations?
Deletion: Part of a chromosome is missing. Duplication: A segment of a chromosome is copied multiple times. Inversion: A segment of a chromosome is reversed in orientation. Translocation: Part of a chromosome breaks off and attaches to another chromosome.
What is the difference between Edward's syndrome and Patau's syndrome?
in Patau there is an extra chromosome in chromosome 13, in Edwars it the extra chromosome is in chromosome 18
What condition is carried on a chromosome other then the sex chromosome?
The gene that causes cystic fibrosis is located on chromosome 7, which is an autosome, not a sex chromosome.
List these in order from smallest to largest chromosome gene cell?
Smallest to largest: Gene (a place on a chromosome); chromosome (there are 46 in human cells); and DNA (because it accounts for all the genetic material in a cell).
