What does C value paradox mean?
The so-called C-Value Paradox refers to the observation that genome size does not uniformly increase with respect to perceived complexity of organisms, for example vertebrate with respect to invertebrate animals, or “lower” versus “higher” vertebrate animals (red box).
What do you mean by C value?
C-value is the amount, in picograms, of DNA contained within a haploid nucleus (e.g. a gamete) or one half the amount in a diploid somatic cell of a eukaryotic organism.
What is C value paradox and how it is related to gene density?
The C-value paradox is basically this: how can we account for the amount of DNA in terms of known function? Very similar organisms can show a large difference in C-values (e.g. amphibians). The amount of genomic DNA in complex eukaryotes is much greater than the amount needed to encode proteins.
What is C value paradox Slideshare?
Definition: The C-Value Paradox Total amount of DNA is present in genome, it is expressed in base pair. OR Quantity of DNA in an organism per cell, in all cells, is always constant, for a given species. Many authors have assumed that the “C” in “C-value” refers to “characteristic”, “content”, or “complement”.
What is a cot curve?
Cot Curves. • a sigmoid curve which can be characterized by the Cot1/2 value, the point where 1/2 of the DNA is still single stranded.
Is satellite a DNA?
Satellite DNA, together with minisatellite and microsatellite DNA, constitute the tandem repeats….Satellite DNA families in humans.
| Satellite family | Size of repeat unit (bp) | Location in human chromosomes |
|---|---|---|
| α (alphoid DNA) | 170 | All chromosomes |
What are the two types of satellite DNA?
In one species (Azara’s owl monkey Aotus azarae) of this taxon, we identified two types of alpha satellite DNA consisting of 185- and 344-bp repeat units that we designated as OwlAlp1 and OwlAlp2, respectively.
What is the largest gene?
human dystrophin gene
What are the 3 types of genes?
Type I genes tend to be involved in immune response or sensory receptors while type III genes are involved in cell to cell signalling and type II genes are a complex mix of all three types.
What plant has the most genes?
Paris japonica
What is the shortest human gene?
Chromosome 21 is the smallest human chromosome, spanning about 48 million base pairs (the building blocks of DNA) and representing 1.5 to 2 percent of the total DNA in cells.
What is the most important gene?
ApoE-e3 is the most common allele (a variant of the gene) and is found in more than 50% of the general population….According Kerpedjiev, the top-10 most-studied genes are:
- EGFR;
- VEGFA;
- APOE;
- IL6;
- TGFBI;
- MTHFR;
- ESR1; and,
- AKT1.
What does the 20th chromosome do?
Chromosome 20 likely contains 500 to 600 genes that provide instructions for making proteins. These proteins perform a variety of different roles in the body.
Can you be a girl with a XY chromosome?
The X and Y chromosomes are called “sex chromosomes” because they contribute to how a person’s sex develops. Most males have XY chromosomes and most women have XX chromosomes. But there are girls and women who have XY chromosomes. This can happen, for example, when a girl has androgen insensitivity syndrome.
Can an XY female get pregnant?
Males and most XY females cannot become pregnant because they don’t have a uterus. The uterus is where the fetus develops, and pregnancy isn’t possible without it. In most cases, having a Y chromosome means having no uterus, so pregnancy isn’t possible.
Is there a YY gender?
Males with XYY syndrome have 47 chromosomes because of the extra Y chromosome. This condition is also sometimes called Jacob’s syndrome, XYY karyotype, or YY syndrome.
Can a female have Y chromosome?
Each person normally has one pair of sex chromosomes in each cell. The Y chromosome is present in males, who have one X and one Y chromosome, while females have two X chromosomes.