Frequent question: How can sister chromatids have different alleles?

When sister chromatids are in close proximity to one another during cell division. There is an exchange of genetic material. The sister chromatids carry the same genes in the same loci but can have different alleles. It is because of one half from the same.

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.

How are sister chromatids different?

The two sister chromatids are separated from each other into two different cells during mitosis or during the second division of meiosis. … Sister chromatids are by and large identical (since they carry the same alleles, also called variants or versions, of genes) because they derive from one original chromosome.

Do sister chromatids separate during meiosis?

Meiosis II is the second division of meiosis. It occurs in both of the newly formed daughter cells simultaneously. Meiosis II is similar to Mitosis in that the sister chromatids are separated.

Do non-sister chromatids have the same alleles?

Non-sister chromatids are chromatids of homologous chromosomes. … These chromatids contain the exact same genes and the exact same alleles – the chromatids are exact copies of each other.

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What is the meaning of sister chromatids?

Medical Definition of sister chromatid

: either of the two identical chromatids that are formed by replication of a chromosome during the S phase of the cell cycle, are joined by a centromere, and segregate into separate daughter cells during anaphase.

What color should the sister chromatids be for each pair?

Duplicate the chromosome for DNA duplication (S synthesis)  What color should the sister chromatids be for each pair? Yellow and red 4.

Which of the following best describes sister chromatids?

Which of the following best describes the relationship between a chromosome and sister chromatids? Joined identical copies of a duplicated chromosome are called sister chromatids. This video highlights the duplication and distribution of a single chromosome. Human cells have 46 chromosomes in their nuclei.

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