Your question: When and how can sister chromatids become non identical?

Do sister chromatids become non identical?

The DNA sequence of two sister chromatids is completely identical (apart from very rare DNA copying errors). … Non-sister chromatids, on the other hand, refers to either of the two chromatids of paired homologous chromosomes, that is, the pairing of a paternal chromosome and a maternal chromosome.

Why do sister chromatids become genetically non identical after prophase I of meiosis *?

There are now two cells, and each cell contains half the number of chromosomes as the parent cell. In addition, the two daughter cells are not genetically identical to each other because of the recombination that occurred during prophase I (Figure 4).

What are non identical chromatids?

Non-sister chromatids are chromatids of homologous chromosomes. … To summarize: Sister chromatids are the duplicated chromosome itself, they contain the exact same alleles. Non-sister chromatids are the chromatids of the homologous chromosome, they may contain different alleles.

Are chromatids identical?

The sister chromatids are pairs of identical copies of DNA joined at a point called the centromere. During anaphase, each pair of chromosomes is separated into two identical, independent chromosomes. The chromosomes are separated by a structure called the mitotic spindle.

Which of the following are true about sister chromatids?

Sister chromatids are exact copies of each other and are formed just prior to cell division. After mitosis, sister chromatids contain the same genes, but they may have different alleles. Sister chromatids are produced during mitosis. All of these statements about sister chromatids are TRUE.

IT IS INTERESTING:  What are all the benefits of mitosis?