In late anaphase and G1 of interphase, a chromosome is unreplicated and consists of a single DNA double helix.
A replicated chromosome contains two identical DNA double helices.
Yes, the original strand of DNA is typically referred to as the template strand, while the replicated strand is the newly synthesized strand that complements the original. The original strand contains the original sequence of nucleotides, whereas the replicated strand will have the same sequence but may include errors if replication is not accurate. Additionally, the replicated strand can also differ from the original in terms of post-replication modifications or the presence of newly synthesized nucleotides.
Chromosome Nucleosome
The centromere is the region of the chromosome that holds the two sister chromatids together during mitosis. The chromatid is one of the two strands of chromosomes that become visible during mitosis or meiosis.
Chromosomes usually occur in pairs in body cells. One chromosome in the pair comes from one parent and the other chromosome comes from the other parent. The two chromosomes are the same size and shape and carry the same genes in the same positions. They are called homologous chromosomes. When cells divide the chromosomes first have to copy themselves (ie replicate). Each homologous chromosome makes a replica of itself, and the original and replica are attached to each other at a region called the centromere.
In S Phase, DNA replication occurs and it is still an unknown mass like a plate of spaghetti, but during Prophase, the DNA Condenses to chromosomes around a centrally located chromatid. (a little disk in the middle of the X)
Yes, the original strand of DNA is typically referred to as the template strand, while the replicated strand is the newly synthesized strand that complements the original. The original strand contains the original sequence of nucleotides, whereas the replicated strand will have the same sequence but may include errors if replication is not accurate. Additionally, the replicated strand can also differ from the original in terms of post-replication modifications or the presence of newly synthesized nucleotides.
The region of a chromosome holding the two double strands of replicated DNA together is called a centromere. The complex of DNA and protein that makes up eukaryotic chromosome is properly called chromatin.
in Patau there is an extra chromosome in chromosome 13, in Edwars it the extra chromosome is in chromosome 18
Chromosome Nucleosome
A chromatid is one-half of two identical copies of a replicated chromosome. During cell division, the identical copies are joined together at the region of the chromosome called the centromere. They are known as sister chromatids. Once the paired sister chromatids separate from one another in anaphase of mitosis, each is known as a daughter chromosome. [source: About.com/Biology, see link below]
the autosome do not control the sex organs . but the sex chromosome control the sex organs
The genetic difference between men and women comes down to the X and Y chromosome
difference between original marksheet and marksheet after compartment in 12th cbse
The centromere is the region of the chromosome that holds the two sister chromatids together during mitosis. The chromatid is one of the two strands of chromosomes that become visible during mitosis or meiosis.
An autosome is any of the 23 chromosomes which is not an X or Y chromosome. A sex chromosome is effectively the same as an autosome, apart from depending upon whether you inherit a Y chromosome or not, a sex chromosome will determine your gender. Hence the name.
An autosome is any of the 23 chromosomes which is not an X or Y chromosome. A sex chromosome is effectively the same as an autosome, apart from depending upon whether you inherit a Y chromosome or not, a sex chromosome will determine your gender. Hence the name.
Prophase 1 is the phase of meiosis ll when the homologous pairs combine. It is also when centrioles seperate, spindle fibers are formed, the nuclear envelope disappears, and the chromosomes become visible.