Chromosome & DNA: Unpaired Y-Chromosome and Palindromic Algorithms

[aereal]

I've stumbled upon an interesting short article http://www.npr.org/templates/story/story.php?storyId=4225769

It's about the possible danger of Y-chromosome in men loosing its genes throughout the evolution, because it is unpaired (the X-chromosomes are always paired and thus can correct random errors). That could inflict danger on reproduction, however MIT researchers claim that the Y-chromosomes have found an other way to survive by encoding the major genes as palindromes in DNA...

Now, what I can't understand is the following:

what I assume (please correct, if wrong):
1. DNA is a long double-stranded (ds) molecule. It splits into two single-stranded (ss) counterparts only during replication. This is the place where the mutations can take place, however there always remains the second single-stranded counterpart, which will probably remain unchanged.
2. chromosomes are nothing else than a complete (3 billion base pairs), double-stranded DNA molecules.

what I do not understand:
1. How to X-chromosomes couple? Can two double-stranded DNA's couple?
2. What is the danger with Y-chromosome? It is dsDNA, and is "secured" by the fact that mutation will occur only in a single strand, while the other one will survive. Why is the palindromic algorithm needed?
3. How does DNA implement palindromic algorithm? Does it simple bend and copy itself like that:
"__" turns into "U"

Thanks!

 

[aereal]

anyone! please help, or give directions what to read! F1!

 

[ravenprp]

1. X-chromosomes can couple through a process called homologous recombination. During this process, the two copies of the X-chromosome (one from each parent) align and exchange genetic material, resulting in a new combination of genes. This helps to maintain genetic diversity and correct any potential errors in the DNA sequence.

2. The danger with the Y-chromosome is that it is unpaired, meaning there is only one copy of it in males. This makes it more susceptible to mutations and potential loss of genetic information. The palindromic algorithm is a way for the Y-chromosome to ensure that its important genes are duplicated and preserved, even if there are mutations in one of the strands of DNA.

3. The palindromic algorithm works by duplicating a section of the DNA sequence and then reversing it, creating a palindrome. This ensures that even if there are mutations in one strand, the other strand will still have a functional copy of the gene. This process can happen through DNA repair mechanisms or during replication. It does not involve bending or copying like the example you mentioned.