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centromere
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2. What are sister chromatids When do the separate?
In anaphase I the sister chromatids remain attached, while in anaphase II the sister chromatids separate.
The centromere is a region in which?
The centromere is the most condensed and constricted region of a chromosome, to which the spindle fiber is attached during mitosis.
Why do you use non-sister chromatids to demonstrate crossing over?
Crossing over occurs between homologous chromosomes, which are not identical, as one member of each pair of homologous chromosomes comes from the mother, and one member comes from the father. Sister chromatids are identical and crossing over would have no effect.
How does the cell package its DNA ready for division?
At every few intervals,about 5 histones are used to pack DNA.Histones are spherical proteins. http://www.gistsupport.org/learning-center/cells-cancer-and-more/how-dna-is-packaged-in-a-cell.php
How does a duplicated chromosome differ from a chromatid?
Chromosomes are what make up your genetic material. During interphase when the chromosomes are duplicating, they remain attached to their duplicated with a centromere. When they are connected with their duplicate, each individual of this pair is called a chromatid. So a duplicated chromosome is made up of two chromatids which are identical to each other.
2. What are sister chromatids When do the separate?
In anaphase I the sister chromatids remain attached, while in anaphase II the sister chromatids separate.
The centromere is a region in which?
The centromere is the most condensed and constricted region of a chromosome, to which the spindle fiber is attached during mitosis.
Are sister chromatids identical before crossing over occurs?
Yes they are attached at the centromere and remain identicle until crossing over occurs in prophase 1 of meosis
What is centremere?
The point along the length of homologous chromatids where they remain held together to form a chromosome.
How water temperature affects the structure?
The structure of the molecule remain unchanged.
Can you name a plant in which the sepals remain attached after fertilization?
brinjil
Why do you use non-sister chromatids to demonstrate crossing over?
Crossing over occurs between homologous chromosomes, which are not identical, as one member of each pair of homologous chromosomes comes from the mother, and one member comes from the father. Sister chromatids are identical and crossing over would have no effect.
What happens during anaphase 1and 2?
Anaphase 1: 1. Breakdown of proteins responsible for sister chromatid cohesion along chromatid arms allows homologs to separate. 2. The homologs move toward opposite poles, guided by the spindle apparatus. 3. Sister chromatid cohesion persists at the centromere, causing chromatids to move as a unit towards the same pole. At anaphase 1 of meiosis, the replicated chromosomes of each homologous pair move toward opposite poles, but the sister chromatids of each replicated chromosome remain attached. In anaphase of mitosis, by contrast, sister chromatids separate. Reference Cambell et al. Biology (8th Ed) 2008. Benjamin Cummings. pg 254-257
Why is water freezing a physical?
Because the structure remain the same.
How do the particle of water that evaporate from an open container differ from the particles that remain?
The chemical structure of water remain unchanged.
How does the cell package its DNA ready for division?
At every few intervals,about 5 histones are used to pack DNA.Histones are spherical proteins. http://www.gistsupport.org/learning-center/cells-cancer-and-more/how-dna-is-packaged-in-a-cell.php
Which level of protein structure would remain unchanged when a protein is treated with urea?
according to some sources , Urea breaks all bond except for covalent bond , which means the secondary structure will remain , and also the primary structure with peptide bond.
