177 results found

Search Results for: generation

Spontaneous generation

Definition noun plural: spontaneous generations The previously popular notion that living organisms arise or develop from... Read More

Parental generation

Definition noun (genetics) The first set of parents crossed in which their genotype is the basis for predicting the... Read More

First filial generation

Definition noun (genetics) The filial generation comprised of offspring(s) resulting from a cross between two individuals... Read More

Filial generation

Definition noun, plural: filial generations (genetics) Any generation resulting from a genetically controlled mating... Read More

Second filial generation

Definition noun (genetics) The filial generation comprised of offspring(s) resulting from a cross between two individuals... Read More

Generation

Generation 1. The act of generating or begetting; procreation, as of animals. 2. Origination by some process, mathematical,... Read More

Gametophyte generation

Definition noun (botany) A phase in the life cycle of certain plants and algae that starts with a spore up to the time that... Read More

Natural selection

Natural Selection Definition What is natural selection in biology? Natural selection is defined as a process in nature... Read More

Sporophyte generation

Definition noun (botany) A phase in the life cycle of certain plants and algae that starts with the union of gametes up to... Read More

Biogenesis

Definition noun plural: biogeneses (1) The process in which life forms arise from similar life forms (2) A theory that... Read More

Generation of resting membrane potential

Stephen H. Wright Department of Physiology, College of Medicine, University of Arizona, Tucson, Arizona 85724... Read More

Abiogenesis

Definition noun plural: abiogeneses a·bi·o·gen·e·sis, eɪbaɪəʊˈdʒɛnəsɪs (1) The theory postulating that... Read More

Generation time

Generation time (Science: cell biology) time taken for a cell population to double in numbers and thus equivalent to the... Read More

Law of Segregation

Mendel’s Laws of Inheritance The father of genetics, Gregor Mendel, reported his findings in 1860 that were initially... Read More

Genetic drift

Genetic Drift Definition What is genetic drift in simple terms? The simple definition of genetic drift ( also referred to... Read More

Inheritance and Probability

Reviewed by: Mary Anne Clark, Ph.D. Gregor Mendel, an Austrian monk, is most famous in this field for his study... Read More

Incomplete dominance

Incomplete Dominance Definition After Gregor Mendel discovered inheritance laws, the term ''incomplete dominance'' was... Read More

Facultative anaerobe

Facultative Anaerobe Definition What does facultative anaerobe mean? Facultative organisms are the most adaptable... Read More

Fragmentation

Fragmentation Definition What is fragmentation? In general, fragmentation refers to the state or the process of breaking... Read More

Bryophytes

Bryophytes (nonvascular plants) do not have xylem or phloem. The habitations of this plant group are widely varied and... Read More

Axon hillock

Axon Hillock Definition What is axon hillock? If you are familiar with the different parts of the neuron, the axon hillock... Read More

Polygenic inheritance

Polygenic inheritance refers to the kind of inheritance in which the trait is produced from the cumulative effects of many... Read More

Genetic equilibrium

Definition noun A condition where a gene pool is not changing in frequency because the evolutionary forces acting upon the... Read More

Mutagen

Mutagen Definition What is a mutagen? A mutagen is a substance or agent that causes DNA impairment that results in the... Read More

Vascular plants

Definition of Vascular plants The term 'vascular' is derived from the Latin word vāsculum, vās, meaning "a container and... Read More

Sympatric speciation

Speciation is a process of evolution through which two different existing populations evolve and a distinct species form. It... Read More

Dominance

Reviewed by: Mary Anne Clark, Ph.D. The previous tutorial investigated Gregor Mendel and how he found trends in... Read More

Sexual reproduction

Sexual reproduction is a mode of reproduction involving the fusion of haploid female gamete (egg cell) and haploid male... Read More

Physiological adaptation

If we look over evolutionary history, we find that it’s neither the most genius and intelligent nor the strongest and the... Read More

Plant

Plant Definition (botany) Any of the eukaryotic organisms of the biological kingdom Plantae, characterized by being... Read More

Allopatric speciation

We can define speciation as a process by which the novel genetically independent group of organisms are formed through the... Read More

Polygenic trait

Polygenic trait definition Polygenic trait refers to a trait that is controlled by multiple non-allelic genes. These genes... Read More

Obligate aerobe

Before we define obligate aerobes, let us first understand and define aerobic organisms. Aerobic organisms are those that... Read More

Homeostasis

Homeostasis is the tendency not to stray from the range of favorable or ideal internal conditions. Such conditions must be... Read More

Chemiosmosis

Chemiosmosis Definition What is chemiosmosis? In biology, chemiosmosis refers to the process of moving ions (e.g. protons)... Read More

Sporophyte

'''sporophyte spore producing plant generation. The dominant generation in pteridophytes and higher plants and alternates... Read More

Biology

Biology Definition Biology is the branch of science that primarily deals with the structure, function, growth, evolution,... Read More

Law of Independent Assortment

Law of Independent Assortment Definition The Mendelian inheritance principles are derived from and named after the monk,... Read More

Red algae

The red algae belong to the phylum Rhodophyta which literally was derived from the Greek word ῥόδον (rhodon), meaning... Read More