students Logo
Home | Sitemap | Contact us | Search | Language
  CareerCareers Exams Competitive Exams College Colleges Scholarship Scholarships Loan Loans Results Exam Results Login Login
Left Right
  Home >> Genetics Dictionary >> Euploid, Exogenous-DNA

Euploid
A cell having any number of complete chromosome sets or an individual composed of such cells.
2. Containing a chromosome number that is an exact multiple of the haploid chromosome number.

Euploidy
A polyploid cell or organism whose chromosome number is an exact multiple of the basic number of the species from which it originated

Evolution
The origin of organisms by modification of previously existing organisms.
2. Darwin defined this term as "descent with modification." It is the change in a lineage of populations between generations. In general terms, biological evolution is the process of change by which new species develop from preexisting species over time; in genetic terms, evolution can be defined as any change in the frequency of alleles in populations of organisms from generation to generation.
3. Genetic changes within a genealogical lineage producing ­speciation.

Evolutionary classification
Method of classification using both cladistic and phenetic classificatory principles. To be exact, it permits paraphyletic groups (which are allowed in phenetic but not in cladistic classification) and monophyletic groups (which are allowed in both cladistic and phenetic classification) but excludes polyphyletic groups (which are banned from cladistic classification but permitted in phenetic classification).

Evolutionarily conserved

See: conserved sequence.

Ewald, Paul

Professor of biology at Amherst College, specializing in hummingbird and flower coevolution and the evolution of infectious diseases. His research on disease focuses on the evolutionary effects of various public health interventions.

Ex-AFP
Expanded alpha feto protein test. A screening test which measures analytes in maternal blood to determine the likelihood of a particular fetal anomaly. Currently, the test screens for neural tube defects (NTDs)/ventral wall defects, trisomy 21 (Down syndrome) and trisomy 18 (Edwards syndrome). Originally, the test measured only alpha feto protein (AFP). It was expanded to measure human chorionic gonadotropan (HCG) and unconjugated estriol (uE3) to make it more sensitive to the probable presence of the trisomies

Excision repair

Repair of damaged DNA by removal of the damaged segment of DNA and its replacement with a newly synthesized correct segment.

Exogenous DNA
DNA originating outside an organism that has been introducted into the organism

 

 

Left Right