The only human cells that do not contain a pair of chromosomes are reproductive cells (gametes). Egg and sperm cells carry just one copy of each chromosome so that when they unite they become a single cell containing a pair of chromosomes. Humans have 23 pairs of chromosomes. (Image credi...
To evaluate the degeneration effects of such mutations on neo-Y-linked genes, we characterized 23 gene pairs that are located in the inverted region on the neo-Y chromosome (Additional data file 1), one pair in the neo-Y 'PAR' region, and six pairs on autosomes. These genes were ...
Because BAC inserts are often 100-kb pairs or more in size, most contain one or more SSRs. This strategy was applied to two regions of the soybean genome near genes that condition resistance to the soybean cyst nematode on molecular linkage groups G and A2. This targeted approach to ...
The X chromosome does much more than turn an embryo into a biological male. It has genes involved in many other processes as well. The other 22 pairs, which altogether contain tens of thousands of genes, don't have central roles in sex development. These chromosomes are known as autosomal ...
describes the structure of the double helix. One of DNA's most important properties is its ability to replicate itself. In the double helix, each strand of DNA serves as a template for replicating the sequence of the bases. For one new cell to contain the same DNA as an old one, a ce...
Several techniques have recently been developed to detect single-base mismatches in DNA heteroduplexes that contain one strand of wild-type and one strand ... A,Ganguly,M,... - 《Proceedings of the National Academy of Sciences of the United States of America》 被引量: 1368发表: 1993年 A...
genes, rapid acquisition of lineage-specific genes, and a low rate of gene duplication. Moreover, we presented evidence that all available 67 W chromosomes originated from a common ancestor chromosome, with four neo-W chromosomes identified, including one generated by fusion with an autosome and ...
the X and Y chromosomes of a man’s cells are not. They differ in size and shape, with the X being much larger than the Y, and contain different mostly different genes (although they do have small regions of similarity). The X and Y chromosomes are known assex chromosomes, while the...
In contrast, we found that arms of chromosomes that have retained large clusters of genes resulting from the ancestral WGD events contain a disproportionate number of mammalian orthologs in our analysis. Approximately 35% of genes still exist in duplicate copies39, and several paralogs resulting from...
karyotyping provides an overview of any gross rearrangements and changes in chromosome number that have occurred in a patient's cells. Using gene-specific probes, cytogeneticists can also positively identify the genes affected by chromosomal mutations. More recently, researchers have additionally begun ...