Frequent question: Do duplicated chromosomes have the same alleles?

Each pair are considered homologous, and carry the same genes in the same order, but the alleles for each trait may not be the same.

Can replicated chromosomes have different alleles?

Chromosomes come in pairs of homologous chromosomes. In each pair of homologous chromosomes, both chromosomes have the same genes at the same locations. A gene may have different alleles on the two homologous chromosomes (e.g. Aa) or a gene may have the same alleles (e.g. SS).

How are duplicated chromosomes different from homologous chromosomes?

The difference between a duplicated chromosome and a chromatid, strictly speaking, is that a chromosome contains two chromatids that are joined at a structure called a centromere. A duplicated chromosome therefore includes two identical strands joined along their length at corresponding lengths of DNA.

What makes up a duplicated chromosome?

Because each duplicated chromosome consists of two identical sister chromatids joined at a point called the centromere, these structures now appear as X-shaped bodies when viewed under a microscope. Several DNA binding proteins catalyze the condensation process, including cohesin and condensin.

What is the main difference between chromatin and chromosomes?

Chromatin is a complex formed by histones packaging the DNA double helix. Chromosomes are structures of proteins and nucleic acids found in the living cells and carry genetic material. Chromatin is composed of nucleosomes. Chromosomes are composed of condensed chromatin fibers.

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Are chromosomes duplicated in mitosis?

Mitosis is a fundamental process for life. During mitosis, a cell duplicates all of its contents, including its chromosomes, and splits to form two identical daughter cells. Because this process is so critical, the steps of mitosis are carefully controlled by certain genes.

What does it mean when two sets of chromosomes are homologous?

These two sets of chromosomes are homologous, meaning that each of the four chromosomes from the male parent has a corresponding chromosome from the female parent. What are Diploid Cells? homologous chromosomes is diploid, meaning “two sets.” The diploid number of chromosomes is sometimes represented by the symbol 2N.

What are the two halves of a duplicated chromosome called?

Definition: A chromatid is one of two identical halves of a replicated chromosome .

Can a chromosome have one chromatid?

When fully condensed, replicated chromosomes appear as thick X-shaped structures that are readily observed under the microscope (see figure below). Chromosomes can have 1 or 2 chromatids, depending on whether they have replicated.

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