Do sister chromatids have different alleles?
Sister Chromatids. … Although homologs are copies of the same chromosome inherited from two different parents, they are not identical as they might have different alleles for same genes, while the sister chromatids are the replicated form of an individual chromosome, and hence they are identical to each other.
Why sister chromatids could not have different alleles?
Explain why, in a real cell, sister chromatids could not have different alleles. Sister chromatids are formed after DNA replication (when each chromosome makes a copy of itself). Sister chromatids must be exact duplicates of each other, so they could not have different alleles.
What do sister chromatids contain?
A single replicated chromosome has two sister chromatids. One chromatid is shown in yellow, the other in blue. The two chromatids contain exactly identical chains of double-stranded DNA, as well as a protein support structure composed of mostly of histones. Histones are proteins present in all eukaryotic cells.
How are sister chromatids different than individual chromatids?
Sister chromatids are of the same chromosomes, while the non-sister chromatids are of the different chromosomes. Thank you. Mandira P. Sister chromatids belong to same chromosome while nonsister chromatids belong to different members of homologous pair.
Do sister chromatids separate in mitosis?
Sister chromatids are held together during chromosome replication and remain together until the chromatids are separated at mitosis.
Are the alleles in mitosis?
Modeling Mitosis with One Pair of Homologous Chromosomes
Find a pair of model homologous chromosomes, one with the a and s alleles and the other with the A and S alleles. … Now the cell is ready for cytokinesis which will produce two daughter cells, each with a complete set of chromosomes.
Can you tell the difference between the original and the replicated strand?
Can you tell the difference between the original and the replicated strand? The strands are suppose to be exactly same when replication is complete, so you would not be able to tell the difference.
Why are chromosomes replicated?
In eukaryotic cells, the nucleus divides before the cell itself divides. The process in which the nucleus divides is called mitosis. Before mitosis occurs, a cell’s DNA is replicated. This is necessary so that each daughter cell will have a complete copy of the genetic material from the parent cell.
Do homologous chromosomes carry the same alleles?
Homologous chromosomes have alleles on the same genes located in the same loci. Heterologous chromosomes have alleles on different genes. Gene exchanges may occur at synapse. Gene exchanges may occur at translocation.