518 results found

Search Results for: gene

Gene

A gene is the fundamental, physical, and functional unit of heredity. The genes make up the sequences of DNA (genotypes).... 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

SELFISH GENE – selfish to persist

What is a selfish gene? A selfish gene is not a gene that makes an individual selfish. In fact, it may even be involved in... Read More

Genetic diversity

Genetic Diversity Definition Each species is composed of individuals with their own set of genes. A gene is the inheritance... Read More

Genetic Mutations

Reviewed by: Mary Anne Clark, Ph.D. Genetic Mutations Genetic mutations are inherited variations in an... Read More

Gene amplification

Definition noun, plural: gene amplifications The process of duplicating a particular gene, causing the gene to increase in... Read More

The Gene Pool and Population Genetics

Reviewed by: Mary Anne Clark, Ph.D. The previous tutorial is about adaptive radiation. Adaptive radiation is... Read More

CRISPR DIY – biohacking genes at home

Have you ever thought of changing yourself for the better -- genetically-speaking? Lately, CRISPR company has been selling a... Read More

Gene flow

Definition noun The movement and exchange of genes or alleles from one population of species to another Supplement Gene flow... Read More

Vertical gene transfer

Definition noun (genetics) The transfer of genes from parents to offspring Supplement Gene transfer refers to the movement... Read More

Gene pool

Definition noun, plural: gene pools (population genetics) The total number of genes of every individual in an interbreeding... Read More

Sex-determining Region Y gene

Definition noun The gene that codes for the SRY protein, which is associated with the testicular development in many male... Read More

Gene transfer

Definition noun, plural: gene transfers The transfer of genes between organisms Supplement Gene transfer pertains to the... Read More

Regeneration in humans – Finding the gene switch

Regeneration in humans is much more limited compared in other animals. Say for instance when one lost a limb, much as well... Read More

Genetic Engineering Advantages & Disadvantages

  Through genetic engineering, scientists are able to move desirable genes from one plant or animal to another or... Read More

Maternal-effect gene

Definition noun, plural: maternal-effect genes (1) A gene from the mother's genome in which its phenotype in the zygote is... Read More

Gene Action – Operon Hypothesis

Reviewed by: Mary Anne Clark, Ph.D. Some genes are switched on or off depending on environmental conditions. The... Read More

Regulatory gene

Definition noun, plural: regulatory genes A gene that is involved in the production of a substance that controls or... Read More

Genetic Information and Protein Synthesis

Genetic Code Genes are sequences of DNA nucleotides that carry and transmit the information specifying amino acid sequences... Read More

Additive genes

Definition noun Genes that code for the same function or trait and their effects work together on the... Read More

Pleiotropy

Pleiotropy Definition When one single gene starts affecting multiple traits of living organisms, this phenomenon is known... Read More

Gene Regulation in Eukaryotes

Reviewed by: Mary Anne Clark, Ph.D. Eukaryotic Gene Structure In prokaryotes the DNA is located in the... Read More

Polygene

Definition noun, plural: polygenes A group of genes that produces a specific phenotype or trait only when expressed... Read More

Pair-rule gene

Definition noun A segmentation gene whose expression subdivides the embryo into a series of stripes, and sets the boundaries... Read More

Zygotic-effect gene

Definition noun, plural: zygotic-effect genes (1) Any of the genes expressed in the early embryo. (2) Any of the genes... Read More

Gene gun

Definition noun A method of transferring large molecules such as DNA into the cell by coupling the DNA to a nanoparticle of... Read More

Genetic Control – On and Off Genes

Reviewed by: Mary Anne Clark, Ph.D. This lesson looks at the various factors involved that affect growth and... Read More

Maternal gene

Definition noun, plural: maternal genes (1) A gene from the mother's genome in which its expression on the phenotype of the... Read More

Y-linked gene

Definition noun, plural: Y-linked genes A gene located on the Y chromosome Supplement Y chromosome is the male chromosome of... Read More

Multiple alleles

Alleles are the pairs of genes occupying a specific spot called locus on a chromosome. Typically, there are only two alleles... Read More

Facultative gene

Definition noun, plural: facultative genes (1) A gene transcribed only when needed or when a cell receives a signal from its... Read More

Hox gene

Definition noun, plural: Hox genes Any of the developmental control genes involved in establishing the anterior-posterior... Read More

Monogene

Definition noun, plural: monogenes (genetics) Single gene controlling the expression of a particular trait Supplement In... Read More

Gene conversion

Definition noun A nonreciprocal gene transfer in which an allele converts the other allele into the same form as its self,... Read More

Allele

Allele Definition What are alleles? An allele is a term coined to describe a specific copy of a gene. Genes, the DNA... Read More

Hemizygous gene

Definition noun A gene in which it has no allelic counterpart or is present as only a single copy instead of the usual two... Read More

Gene synthesis

Gene synthesis (Science: molecular biology) The complete synthesis of a gene using a dna synthesiser (gene machine), or the... Read More

Lethal Gene

Any gene that has an effect that causes the death of the organism at any stage of life.A genes whose effect on the phenotype... Read More

Constitutive gene

Definition noun, plural: constitutive genes A gene that is transcribed at a relatively constant level regardless of the cell... Read More

Genetic disorder

Definition noun, plural: genetic disorders A disorder caused by genetic abnormality Supplement A genetic disorder is a... Read More