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How do you find the total number of chromosomes of an organism when given the haploid number?
Wiki User
∙ 14y ago
You double the haploid number.
Wiki User
∙ 14y ago
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Why is pollen a diploid?
Not sure what level you're asking this on; pollen is not really haploid (it has several cells). Anyway, here goes: In normal sexual reproduction, half of each parents' DNA combines to form a new genetic code. A haploid cell has half the number of chromosomes contained in a diploid (normal) cell. This means that the offspring are a mixture of the characteristics of the parent organisms, creating variety within the population. If pollen was not haploid, it could not provide genetic material capable of binding to the ovum's genes. Pollen actually contains 3 haploid cells; so a pollen grain is not a single cell. When it meets the stamen of another plant, one cell forms a tube going down to the ova, acting as a sort of navigation system, while 2 of the cells follow. It was at this point that this mornings genetics lecture ended, so to find out what happens next, I'll have to wait until next Monday. Hope some of that was useful :)
Explain how the chromosomes number is reduced from diploid to haploid through the stages of meiosis?
During meiosis, the number of chromosomes in a cell are split in half so that each daughter cell becomes haploid. This means that given 2n chromosomes, after meiosis I, each cell has 2n chromatids, or n chromosomes. After anaphase II, each daughter cell ends up with n chromosomes, each made up of 1 chromatid. Rearrangement is the process that ensures genetic diversity, which allows for crossover and independent assortment during prophase I.
What is the name given to body cells due to the number of chromosomes?
Diploid Cells
What is the name given to your body cells due to the number of chromosomes?
Diploid Cells
Why do shrimps have so many chromosomes?
There's no real rhyme or reason to the number of chromosomes a given species of animal or plant has. They just have however many they have; there isn't really a "why" involved.
How do you calculate diploid and haploid?
The "haploid number" is the number of chromosomes in a given organism's reproductive cell (i.e., either sperm or egg or similar, depending on the species) or it's the number of pairs of chromosomes in an organism. They are easier to count just before mitosis or during the interphase of meiosis. So put a cell under a microscope, make sure it is in the right phase of reproduction and count the little "X's".
Egg and sperm cells are Haploid of Deploid?
Ploidy is the number of complete sets of chromosomes in a biological cell. In humans, the somatic cells that compose the body are diploid (containing two complete sets of chromosomes, one set derived from each parent), but sex cells (sperm and egg) are haploid. In contrast, tetraploidy (four sets of chromosomes) is a type of polyploidy and is common in plants, and not uncommon in amphibians, reptiles, and various species of insects. The number of chromosomes in a single non-homologous set is called the monoploid number (x). The haploid number (n) is the number of chromosomes in a gamete of an individual. Both of these numbers apply to every cell of a given organism. For humans, x = n = 23; a diploid human cell contains 46 chromosomes: 2 complete haploid sets, or 23 homologous chromosome pairs. In some species (especially plants), x and n differ, for example common wheat is an allopolyploid with six sets of chromosomes, two sets coming originally from each of three different species, with six sets of chromosomes in most cells and three sets of chromosomes in the gametes. The Australian bulldog ant, Myrmecia pilosula, a haplodiploid species has n = 1, the lowest known (and lowest theoretically possible) n. Euploidy is the state of a cell or organism having an integral multiple of the monoploid number, possibly excluding the sex-determining chromosomes. For example, a human cell has 46 chromosomes, which is an integer multiple of the monoploid number, 23. A human with abnormal, but integral, multiples of this full set (e.g. 69 chromosomes) would also be considered as euploid. Aneuploidy is the state of not having euploidy. In humans, examples include having a single extra chromosome (such as Down syndrome), or missing a chromosome (such as Turner syndrome). Aneuploidy is not normally considered -ploidy but -somy, such as trisomy or monosomy.Diploid (indicated by 2n) cells have two homologous copies of each chromosome, usually one from the mother and one from the father. The exact number of chromosomes may be one or two different from the 2 number yet the cell may still be classified as diploid (although with aneuploidy). Nearly all mammals are diploid organisms (the viscacha rats Pipanacoctomys aureus and Tympanoctomys barrerae are the only known exceptions as of 2004[verification needed]), although all individuals have some small fraction of cells that display polyploidy. Human diploid cells have 46 chromosomes and human haploid gametes (egg and sperm) have 23 chromosomes.
Why is pollen a diploid?
Not sure what level you're asking this on; pollen is not really haploid (it has several cells). Anyway, here goes: In normal sexual reproduction, half of each parents' DNA combines to form a new genetic code. A haploid cell has half the number of chromosomes contained in a diploid (normal) cell. This means that the offspring are a mixture of the characteristics of the parent organisms, creating variety within the population. If pollen was not haploid, it could not provide genetic material capable of binding to the ovum's genes. Pollen actually contains 3 haploid cells; so a pollen grain is not a single cell. When it meets the stamen of another plant, one cell forms a tube going down to the ova, acting as a sort of navigation system, while 2 of the cells follow. It was at this point that this mornings genetics lecture ended, so to find out what happens next, I'll have to wait until next Monday. Hope some of that was useful :)
Explain how the chromosomes number is reduced from diploid to haploid through the stages of meiosis?
During meiosis, the number of chromosomes in a cell are split in half so that each daughter cell becomes haploid. This means that given 2n chromosomes, after meiosis I, each cell has 2n chromatids, or n chromosomes. After anaphase II, each daughter cell ends up with n chromosomes, each made up of 1 chromatid. Rearrangement is the process that ensures genetic diversity, which allows for crossover and independent assortment during prophase I.
What is the name given to your body cells due to the number of chromosomes?
Diploid Cells
What is the name given to body cells due to the number of chromosomes?
Diploid Cells
When the two haploid gametes contain two different alleles of a given gene the resulting offspring is called?
A heterozygote. An organism with the same alleles at a locus is called a "homozygot".
What does the word gametes mean in science terms?
Gametes are haploid cells containing half of the genetic material commonly found in a given human cell. i.e. A normal human cell contains 23 pairs of chromosomes (46 chromosomes)... gamete cells e.g. sperm and egg cells contain only 23 chromosomes and are therefore haploid, when fertilisation occurs, the 2 cells join creating a diploid cell with a full set of genetic material... excluding conditions such as Down's Syndrome.
What are the results and implications of meiosis?
Meiosis is the process of dividing a diploid cell into haploid cells. The main results of meiosis are four haploid cells. Genetically, these cells differ from the diploid cell and from each other.
What are the umber of chromosomes in bone marrow?
The number of chromosomes is independent of where in the body a given cell is located. It depends instead on the animal in question. For example, a human has 46 chromosomes in each cell that has a nucleus.
The sex cell of an animal has 20 chromosome the body cell of the same animal has how many chromosomes?
10. Meiosis divides the chromosomes in half and is usually performed to produce sex cells. When two of these cells meet they can make a complete, in this case a 20 chromosome containing, cell.
Describe what happens to the number of chromosomes when two grasshopper sex cells join to fertilization?
2n. Given that the sperm has (n) number of chromosomes, and the egg has (n) number of chromosomes, then the zygote will contain (2n) number of chromosomes. For example, a sperm cell of a human contains 23 chromosomes. The egg cell also contains 23 chromosomes. After they join, the resulting zygote will contain 46 chromosomes.
