How many chromosomes does a polyploid cell have?

What is polyploid cells?

Polyploidy, the condition in which a normally diploid cell or organism acquires one or more additional sets of chromosomes. In other words, the polyploid cell or organism has three or more times the haploid chromosome number.

What does a cell contain if it is said to be polyploid?

Cells (and their owners) are polyploid if they contain more than two haploid (n) sets of chromosomes; that is, their chromosome number is some multiple of n greater than the 2n content of diploid cells. For example, triploid (3n) and tetraploid cell (4n) cells are polyploid.

What is the difference between diploid and polyploid?

is that polyploid is (genetics) having more than the usual number of complete sets of chromosomes in a single cell while diploid is (cytology) of a cell, having a pair of each type of chromosome, one of the pair being derived from the ovum and the other from the spermatozoon most somatic cells of higher organisms are …

How are polyploids formed?

Polyploids arise when a rare mitotic or meiotic catastrophe, such as nondisjunction, causes the formation of gametes that have a complete set of duplicate chromosomes. … If a diploid gamete fuses with another diploid gamete, however, this gives rise to a tetraploid zygote, which is potentially stable.

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Can polyploidy reproduce?

In cases such as this, the offspring are sterile and can no longer reproduce because of the odd number of chromosomes they provide for offspring. The success of polyploidy occurs when two tetraploids combine and reproduce to create more tetraploid offspring.

How many chromosomes are there in a muscle cell?

A human skeletal muscle cell is multinucleated (it has multiple nuclei) and has more than 23 pairs of chromosomes. Skeletal muscle cells are formed…

Why are hepatocytes polyploid?

A characteristic feature of hepatocytes is polyploidy, which is an increase in the numbers of chromosome sets per cell. Liver polyploidy occurs during postnatal development as an age-dependent process, as well as during repair in response to injury from various stress stimuli.

How many chromosomes does a aneuploid cell have?

Aneuploidy is the presence of an abnormal number of chromosomes in a cell, for example a human cell having 45 or 47 chromosomes instead of the usual 46. It does not include a difference of one or more complete sets of chromosomes.

Specialty Medical genetics

How many chromosomes would be found in an Allopolyploid plant if its parents?

How many chromosomes would be found in an allopolyploid plant if its parents had diploid numbers of 4 and 6 respectively? diploid number of 5. The parents contribute 2 and 3 chromosomes respectively to each of their gametes.

What are some characteristics of polyploid plants?

Polyploid plants possess three or more sets of homologous chromosomes. The increase in chromosome number in these plants is the result of a genome duplication event.

Is the case of polyploidy when the chromosomes originate from the hybridization of two different species usually closely related?

ALLOPOLYPLOIDY. Polyploidy can also result from hybridization of two closely related species, leading to viable hybrids when the genomes are very similar, or to sterile hybrids when the chromosomes are insufficiently similar to synapse (pair) during meiosis.

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