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2021-05-17

How many chromosomes are in a daughter cell after mitosis?

How many chromosomes are in a daughter cell after mitosis?

30 chromosomes

How many chromosomes would a cell have during metaphase 1 if it has 12 chromosomes during interphase?

Interphase G2-12 chromosomes and 24 DNA molecules per cell. Meiosis prophase-chromosomes-12 and DNA molecules-24 per cell. Metaphase I meiosis-chromosomes-12 and DNA molecules-24 per cell.

How many chromosomes will each cell have after mitosis?

46 chromosomes

What is the difference between Minisatellites and microsatellites?

Microsatellite is a type of repetitive DNA in the eukaryotic genome with a 2-6 base pairs long repetitive sequences. On the other hand, minisatellite is a type of repetitive DNA with 10-100 base pairs long repetitive sequences. They mainly occur at the end of the chromosomes and can be used for DNA fingerprinting.

What is Alphoid DNA?

The alphoid DNA family is composed of tandemly repeated sequences whose organization is chromosome specific. Under stringent conditions of hybridization, subsets of these sequences localize specifically to the centromeric region of a given chromosome.

What is bulk DNA?

DNA bulks are valuable for studying large numbers of individuals and markers. Each bulk is a combination of DNA from several individuals, usually up to 30 samples, coming from a given group. The source can be a family, a local population sample, a taxonomical unit, a variety, a set of selected individuals, etc.

What is the function of satellite DNA?

Satellite DNA forms essential structures of chromosomes, such as telomeres and centromeres, ensuring protection and stability of chromatin of these sites (Yunis and Yasmineh, 1971; Garrido-Ramos, 2017; Lower et al., 2018).

What is the role of satellite DNA in DNA fingerprinting?

Satellite DNA, also termed as microsatellite, show relative uniformity within species and great variability between closely related species. Also, different individuals differ in a number of repeats of ssDNA. This DNA polymorphism is used in DNA fingerprinting to create DNA profiles of individuals.

How can satellite DNA be isolated explain?

Satellite DNA is separated from bulk genomic DNA by density-gradient centrifugation technique. In this technique, the particles (in this case DNAs) are separated on the basis of their density or rate of sedimentation.

Why are there repeated sequences in DNA?

Generic repeated signals in the DNA are necessary to format expression of unique coding sequence files and to organise additional functions essential for genome replication and accurate transmission to progeny cells.

Where does microsatellite DNA present in the chromosome?

The telomeres at the ends of the chromosomes, thought to be involved in ageing/senescence, consist of repetitive DNA, with the hexanucleotide repeat motif TTAGGG in vertebrates. They are thus classified as minisatellites.

What forms the basis of DNA fingerprinting?

Satellite DNAs show polymorphism (the occurrence of mutations in a population at high frequency), which is the basis of genetic mapping of human genome as well as DNA fingerprinting.