Question

When dna replicates the chromosomes are attached with centromere.how are homologous chromosomes attached?

Answer 1

With a protein called Kinetochore

Explanation:

" The kinetochore is a protein structure on chromatids where the spindle fibers attach during cell division to pull sister chromatids apart Their proteins help to hold the sister chromatids together and also play a role in chromosome editing "
![https://en.wikipedia.org/wiki/Kinetochore]

Answer 2

During DNA replication, the chromosomes have not yet formed. Chromatin condenses to form chromosomes during prophase of mitosis, and prophase I and prophase II of meiosis.

Explanation:

Homologous chromosomes are pairs of chromosomes that are inherited from both parents. They have the same gene loci, but they may have different alleles (forms of genes). During prophase I of meiosis, the chromatids of a pair of homologous chromosomes may cross over, forming chiasmata at the point at which they trade genetic material.

Crossing over sometimes occurs during mitosis in somatic cells, but it is rare, and is suspected of allowing recessive cancer genes to be expressed.