Seven cells are present in a mature female gametophyte ...... Three antipodal cells at the chalazal end and the egg apparatus having an egg and two help cells also called synergids and a secondary cell at the centre having two fused nucleus ......
Animal cells that are capable of meiosis are typically diploid, meaning they have two sets of chromosomes. During meiosis, these diploid cells undergo two rounds of cell division to produce haploid gametes with only one set of chromosomes.
It does not change. Mitosis results in two identical cells with exactly the same number of chromoses. Mitosis occurs in somatic cells for the purpose of growth of tissues, unlike meiosis which occurs in sex cells prior to fertilisation. while mitosis starts and ends as a 2n cell the part about it not changing is wrong. mitosis starts off as 2n then each chromatid replicates creating a 4n cell in prophase until it reaches telophase it goes back to 2n as the chromatids separate at the poles, and the daughter cells are formed.
it has more human cells actually the human body has more bacterial cells. Although it may seem more likely that the human body would have more human cells than bacterial cells. -Vasillisa
If the chromosome number of a plant is 16, then the ploidy level of the microspore mother cell would be 2n=16 (diploid) and the endosperm cells would typically be 3n=24 (triploid), as they result from the fusion of a haploid sperm cell and a diploid central cell in double fertilization.
During meiosis I, the DNA content is halved as homologous chromosomes separate, leading to haploid daughter cells. In meiosis II, sister chromatids separate without DNA replication, resulting in four haploid daughter cells with the same DNA content as the parent cell before starting meiosis.
Human somatic cells are diploid, 2n. Human sex cells are haploid, n. Thus, the ploidy of human cells is 2, while n=23.
Generally, a somatic cell in a human body has 46 chromosomes, which are two complete sets of 23 chromosome pairs. Because they have two sets, these cells have a ploidy level of diploid.
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Ploidy
Animal cells that are capable of meiosis are typically diploid, meaning they have two sets of chromosomes. During meiosis, these diploid cells undergo two rounds of cell division to produce haploid gametes with only one set of chromosomes.
Its ploidy is 1n.
The micropyle is a hole in the seed coat, it is literally nothing. Hence it is not made of cells and has no chromosomes.
The aleurone layer is the outermost layer of the endosperm. Therefore it is also triploid and same as the ploidy of endosperm.
At the end of mitosis two daughter cells are produced identical to the parent cell. If the parent cell is haploid the daughter cell will be haploid. If the parent cell is diploid the daughter cell is also diploid.
PEN, or pollen tube, typically has a haploid ploidy level (n), as it develops from the haploid pollen grain during fertilization in flowering plants. The pollen grain itself originates from the male gametophyte, which undergoes meiosis to produce haploid cells. Therefore, the ploidy of PEN is haploid, containing one set of chromosomes.
The ploidy of a nucleus refers to the number of sets of chromosomes it contains. In humans, somatic cells are typically diploid (2n), meaning they have two sets of chromosomes, one from each parent. In contrast, gametes (sperm and egg cells) are haploid (n), containing only one set of chromosomes. Other organisms may have different ploidy levels, such as triploid (3n) or tetraploid (4n), depending on their specific genetic makeup.
It does not change. Mitosis results in two identical cells with exactly the same number of chromoses. Mitosis occurs in somatic cells for the purpose of growth of tissues, unlike meiosis which occurs in sex cells prior to fertilisation. while mitosis starts and ends as a 2n cell the part about it not changing is wrong. mitosis starts off as 2n then each chromatid replicates creating a 4n cell in prophase until it reaches telophase it goes back to 2n as the chromatids separate at the poles, and the daughter cells are formed.