Let us know about Chromosomal Crossover. Chromosomal crossover , or crossing over , is the exchange of genetic material during sexual reproduction between non-sister chromatids of two homologous chromosomes , resulting in recombinant chromosomes . It is one of the last steps of genetic recombination , which occurs in the pachytene stage of prophase I …
A sister chromatid refers to identical copies ( chromatids ) formed by DNA replication of a chromosome , in which both copies are joined together by a common centromere . In other words, a sister chromatid can also be referred to as the ‘half’ of a duplicated chromosome. A pair of sister chromatid is called …
Marchantiophyta about this soundare a division of non-vascular land plants commonly referred to as hepatis or liverworts . Like mosses and hornworts , they have a gametophyte -dominant life cycle, in which plant cells carry only one set of genetic information. It is estimated that there are about 9000 species of liverworts. [4] Some of …
Hornwort are a group of bryophytes ( a group of non – vascular plants ) constituting the division Anthoceratophyta ( / ˌ n oʊ s r t f t , – oʊ f aɪ t / ) . The common name refers to the elongated horn-like structure, which is the sporophyte . As in mosses …
Platycerium is a genus of about 18 species in the polypod family, Polypodiaceae . Ferns in this genus are widely known as staghorn or elkhorn ferns , because of their distinctively shaped fronds . This genus is epiphytic and is native to tropical and temperate regions of South America , Africa , Southeast Asia , …
Marsilea is a genus of about 65 species of aquatic ferns of the family Marsileaceae . The name honors the Italian naturalist Luigi Ferdinando Marsilli (1656–1730). These small plants have an unusual appearance and do not resemble the common fern. Common names include water clover and four-leaf clover because the long stalked leaves have four …
Oligonucleotide are small DNA or RNA molecules, oligomers , that have wide applications in genetic testing , research and forensics . Usually made in the laboratory by solid-phase chemical synthesis , [1] these small fragments of nucleic acids can be manufactured as single-stranded molecules with any user-specified sequence, and therefore can be used for artificial …
In molecular biology and genetics , GC content (or guanine-cytosine content ) is the percentage of nitrogenous bases in a DNA or RNA molecule that are either guanine (G) or cytosine (C). This measurement indicates the ratio of the G and C bases out of a contained four total bases, which also include adenine and …
Ganglioglioma is a rare, slow-growing primary central nervous system (CNS) tumor that most often occurs in the temporal lobe of children and young adults . classification Gangliogliomas are usually benign WHO grade I tumors ; The presence of anaplastic changes in the glial component is considered to represent WHO grade III (anaplastic ganglioglioma). Criteria for …
G-banding or Giemsa bandings is a technique used in cytogenetics to produce a visible karyotype by staining condensed chromosomes . It is useful for identifying genetic diseases through photographic representation of the entire chromosomal complement . [1] Metaphase chromosomes are treated with trypsin (to partially digest the chromosome) and stained with Giemsa stain . heterochromatic …