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A small impermeable membrane is placed between the anchor cell and the other vulva precursor cells in a larva of C elegans What would you expect the result to be?
Wiki User
∙ 10y ago
The outer part of the vulva would develop, but the inner part would not.
Wiki User
∙ 10y ago
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What are the two main functions of nuclear envelope?
The nuclear envelope is a double membrane structure surrounding the nucleus. Its function is to provide compartmentalization to regulate the movement of materials in and out of the cell, and to provide structural support of the nucleus.
What is a multicelled organism?
The smallest multi-celled organism in the world is C. elegans. It has 959 somatic cells and is a few millimeters in length. It has an estimated 17,800 genes which is about half the amount of genes in a human.
What protein do all organisms have in common?
The best example is probably histones. There is lots of variety within proteins though. if you look at a specific protein in 2 different species, even if the two proteins do the same job, they may be mostly different.Some proteins will be found in most mammals, with high 'sequence identity' like those related to muscles (e.g. titin, actin and mysosin) or cell cytoskeleton (e.g. tubulin) but histones tend to be well conserved among all eukaryotes (all things with nuclei) from amoebas to blue whales or c. elegans to humans, with only one or two amino acids different.
When DNA is copied to form chromosomes that have 2 sister chromatids this is called DNA .?
Each chromosome has two arms, labeled p (the shorter of the two) and q (the longer). The p arm is named for "petite" meaning 'small'; the q arm is named q simply because it follows p in the alphabet. (According to the NCBI, "q" refers to the French word "queue".) They can be Metacentric A chromosome is metacentric if its two arms are roughly equal in length. In some cases, a metacentric chromosome is formed by balanced Robertsonian translocation: the fusion of two acrocentric chromosomes to form one metacentric chromosome. Submetacentric If arms' lengths are unequal, the chromosome is said to be submetacentric Acrocentric If the p (short) arm is so short that is hard to observe, but still present, then the chromosome is acrocentric (The "acro-" in acrocentric refers to the Greek word for "peak."). In an acrocentric chromosome the p arm contains genetic material including repeated sequences such as nucleolar organizing regions, and can be translocated without significant harm, as in a balanced Robertsonian translocation. The domestic horse genome includes one metacentric chromosome that is homologous to two acrocentric chromosomes in the conspecific but undomesticated Przewalski's horse. This may reflect either fixation of a balanced Robertsonian translocation in domestic horses or, conversely, fixation of the fission of one metacentric chromosome into two acrocentric chromosomes in Przewalski's horses. A similar situation exists between the human and great ape genomes; in this case, because more species are extant, it is apparent that the evolutionary sequence is a reduction of two acrocentric chromosomes in the great apes to one metacentric chromosome in humans Telocentric A telocentric chromosome's centromere is located at the terminal end of the chromosome. Telomeres may extend from both ends of the chromosome. For example, all mouse chromosomes are telocentric Holocentric With holocentric chromosomes, the entire length of the chromosome acts as the centromere. Examples of this type of centromere can be found scattered throughout the plant and animal kingdoms with the most well known example being in the worm, Caenorhabditis elegans.
How many gens did scientist expect to identify during the human genome project?
In 2003, estimates from gene-prediction programs suggested there might be 24,500 or fewer protein-coding genes. The Ensembl genome-annotation system estimates them at 23,299.When analysis of the draft human genome sequence was published by the International Human Genome Sequencing Consortium on February 15, 2001, the paper estimated only about 30,000 to 40,000 protein-coding genes, much lower than previous estimates of about 100,000. This lower estimate came as a shock to many scientists because counting genes was viewed as a way of quantifying genetic complexity. With about 30,000, the human gene count would be only one-third greater than that of the simple roundworm C. elegans, which has about 20,000 genes.Studies since the publication of the draft genome sequence have generated widely different estimates. An analysis by scientists at Ohio State University suggested between 65,000 and 75,000 human genes, and another study published in Cell in August 2001 predicted a total of 42,000Although the completion of the Human Genome Project was celebrated in April 2003 and sequencing of the human chromosomes is essentially "finished," the exact number of genes encoded by the genome is still unknown. October 2004 findings from The International Human Genome Sequencing Consortium, led in the United States by the National Human Genome Research Institute (NHGRI) and the Department of Energy (DOE), reduce the estimated number of human protein-coding genes from 35,000 to only 20,000-25,000, a surprisingly low number for our species. Consortium researchers have confirmed the existence of 19,599 protein-coding genes in the human genome and identified another 2,188 DNA segments that are predicted to be protein-coding genes.In 2003, estimates from gene-prediction programs suggested there might be 24,500 or fewer protein-coding genes. The Ensembl genome-annotation system estimates them at 23,299.It could be years before a truly reliable gene count can be assessed. The reason for so much uncertainty is that predictions are derived from different computational methods and gene-finding programs. Some programs detect genes by looking for distinct patterns that define where a gene begins and ends ("ab initio" gene finding). Other programs look for genes by comparing segments of sequence with those of known genes and proteins (comparative gene finding). While ab initio gene finding tends to overestimate gene numbers by counting any segment that looks like a gene, comparative gene finding tends to underestimate since it is limited to recognizing only those genes similar to what scientists have seen before. Defining a gene is problematic because small genes can be difficult to detect, one gene can code for several protein products, some genes code only for RNA, two genes can overlap, and many other complications.Even with improved genome analysis, computation alone is simply not enough to generate an accurate gene number. Clearly, gene predictions will have to be verified by labor-intensive work in the laboratory before the scientific community can reach any real consensus.See the related link.
When was Cylindrocladiella elegans created?
Collemopsidium elegans was created in 2002.
When was Oenopota elegans created?
Oenopota elegans was created in 1842.
When was Cancricepon elegans created?
Cancricepon elegans was created in 1886.
When was Cartodere elegans created?
Cartodere elegans was created in 1850.
When was Calyptranthes elegans created?
Calyptranthes elegans was created in 1895.
When was Cyclaspis elegans created?
Cyclaspis elegans was created in 1907.
When was Georissa elegans created?
Georissa elegans was created in 1894.
When was Cneorane elegans created?
Cneorane elegans was created in 1874.
When was Cethegus elegans created?
Cethegus elegans was created in 1984.
When was Teliphasa elegans created?
Teliphasa elegans was created in 1881.
When was Cuapetes elegans created?
Cuapetes elegans was created in 1875.
When was Omphalotropis elegans created?
Omphalotropis elegans was created in 1894.
