During cell division, the chromosomes first replicate so that each daughter cell receives a complete set of chromosomes. Following DNA replication, the chromosome consists of two identical structures called sister chromatids, which are joined at the centromere.
What are two exact copies of a chromosome?
The two copies of a chromosome are called sister chromatids. The sister chromatids are identical to one another and are attached to each other by proteins called cohesins.
What are the 2 copies of the chromosome called when they are still attached to one another?
A chromatid is one of two identical halves of a replicated chromosome.
Are two identical copies of a chromosome connected by a centromere?
The sister chromatids are pairs of identical copies of DNA joined at a point called the centromere. During anaphase, each pair of chromosomes is separated into two identical, independent chromosomes.
What are attached at the centromere What are attached at the centromere?
The centromere is the specialized DNA sequence of a chromosome that links a pair of sister chromatids (a dyad). During mitosis, spindle fibers attach to the centromere via the kinetochore. Centromeres were first thought to be genetic loci that direct the behavior of chromosomes.
What are exact copies of DNA called?
Replication is the process by which a double-stranded DNA molecule is copied to produce two identical DNA molecules. DNA replication is one of the most basic processes that occurs within a cell.
What is one copy of each chromosome called?
5.6 Review of the Genetic Consequences of Meiosis
In meiosis I there is a reduction of the chromosome number from diploid (two separate copies of each chromosome) to haploid (one copy of each chromosome) during the formation of gametes.
What are the two parts of cell division?
There are two types of cell division: mitosis and meiosis. Most of the time when people refer to “cell division,” they mean mitosis, the process of making new body cells.
Are two identical copies of chromosomes produced in animal cells?
During normal cell activity (G1 of interphase) there is only one copy of each chromosome- which is very long and thin and therefore not visible under a microscope. When a cell is ready to divide (mitosis or meiosis) the chromosomes are first replicated to make the identical sister chromatids.