Where do spindle fibers attach to the chromosomes?
kinetochore
What are the fibers called that attach to the chromosomes?
Long protein fibers called microtubules extend from the centrioles in all possible directions, forming what is called a spindle. Some of the microtubules attach the poles to the chromosomes by connecting to protein complexes called kinetochores.
What structure do spindle fibers attach to?
centromeres
What are attached at the centromere?
The centromere is the chromosome region that attaches to a spindle fibre at metaphase of mitosis or meiosis and moves to the spindle pole at anaphase, pulling the rest of the chromosome behind it. The two chromatids into which metaphase chromosomes are usually visibly divided are held together in the centromere region.
What are the white things called that are attached to 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.
Is kinetochore and centromere the same thing?
The main difference between centromere and kinetochore is that centromere is the region where the two sister chromatids are held together after the replication of chromosome where kinetochore is the protein complex on the chromosome where spindle fibers are attached during cell division.
How many kinetochores are in a chromosome?
two kinetochores
How many kinetochores are present in a single centromere?
How many centromeres are in a chromosome?
adamrose. Cliffs AP bio says there is 1 centromere per chromosome.. but after a duplicated chromosome splits, the chromatids are considered chromosomes because each chromatid has 1 centromere.
Does each sister chromatid have its own centromere?
A sister chromatid refers to the identical copies (chromatids) formed by the DNA replication of a chromosome, with both copies joined together by a common centromere. In other words, a sister chromatid may also be said to be ‘one-half’ of the duplicated chromosome.
Does each chromatid have its own centromere?
A chromatid is a replicated chromosome having two daughter strands joined by a single centromere (the two strands separate during cell division to become individual chromosomes).
What are the three centromere positions on chromosomes?
On the basis of the location of the centromere, chromosomes are classified into four types: metacentric, submetacentric, acrocentric, and telocentric. As previously mentioned, the centromere is easily visualized as the most constricted region of a condensed mitotic chromosome.
What 2 parts make up a chromosome?
DNA is coiled around proteins called histones, which provide the structural support. Chromosomes help ensure that DNA is replicated and distributed appropriately during cell division. Each chromosome has a centromere, which divides the chromosome into two sections – the p (short) arm and the q (long) arm.
Do centromeres replicate?
The centromere is a crucial component that allows for mitosis to happen. A centromere is like belt on chromosomes that can be pulled on when chromosomes are moved within an cell. Since centromeres are part of the chromosome, they replicate when the rest of the chromosome/DNA replicates.
What two fundamental parts make up a chromosome?
DNA and histone proteins are packaged into structures called chromosomes.
Is a nucleus bigger than a chromosome?
Nuclei are smaller than most eukaryotic cells, but bigger than some prokaryotic cells. Chromosomes tend to be smaller than cells or nuclei, and genes are parts of chromosomes.
What is the relationship between DNA and a chromosome?
The chromosomes serve as the structure that holds the DNA. The DNA acts as a complete set of instructions that tells our bodies how to develop. Storing more data than any computer, each chromosome contains all the information needed to give you a base for your physical (and emotional) characteristics.