31 results found

Search Results for: chromosomal mutation

Mutation

Mutation is a permanent, heritable change in the nucleotide sequence or the process by which such a change occurs in a gene... Read More

Chromosome Mutations

Reviewed by: Mary Anne Clark, Ph.D. By nature, the genetic information from both parents is expected to be seen... Read More

Chromosome Mutations – II

Reviewed by: Mary Anne Clark, Ph.D. This page is a continuation of the previous tutorial, Chromosome Mutations... 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

Genetics – Lesson Outline & Worksheets

  Topics Modules Quizzes/Worksheets Description Introduction to Genetics Genetics - Definition:... Read More

Large-scale mutation

Definition noun, plural: large-scale mutations (genetics) A type of mutation several nucleotides of a gene within a large... Read More

Chromosomal mutation

A mutation involving a long segment of dna. These mutations can involve deletions, insertions, or inversions of sections of... Read More

Chromosomal inversion

Definition noun, plural: chromosomal inversions A chromosomal aberration wherein a segment of a chromosome is reversed... Read More

Gene mutation

Definition noun, plural: gene mutations A genetic change at the level of the genes; a change in the nitrogenous base... Read More

Chromosomal crossover

Chromosomal Crossover Definition noun A process occurring during meiosis wherein homologous chromosomes pair up and... Read More

Deletion mutation

Definition noun, plural: deletion mutations (genetics) A type of mutation wherein one or few nucleotide base pairs are... Read More

Homologous chromosome

A homologous chromosome pertains to one of a pair of chromosomes with the same gene sequence, loci, chromosomal length, and... Read More

Gamete

Definition of Gamete What is a gamete? A gamete is the mature reproductive or sex cell that contains a haploid number of... Read More

Nucleotide deletion

Definition noun A deletion of a single nucleotide causing a shift in the reading frame of the codons in the mRNA, thus, may... Read More

Pericentric inversion

Definition noun, plural: pericentric inversions (genetics) An inversion of a segment of chromosome in which the centromere... Read More

Paracentric inversion

Definition noun, plural: paracentric inversions (genetics) An inversion of a segment of chromosome in which the centromere... Read More

Diploid

Diploid Definition Let's first understand the meaning of the word - diploid. From the words ‘di’, meaning "two", and... Read More

Evolution

Reviewed by: Mary Anne Clark, PhD Evolution Definition Evolution (evo‧lu‧tion, ˈɛvəluːʃ(ə)n) is... 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

Recombination DNA repair

Recombination DNA Repair Definition Recombination DNA repair is a biological reparative process in response to DNA damage... Read More

Gene amplification

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

Duplication mutation

Definition noun A type of mutation in which a portion of a genetic material or a chromosome is duplicated or replicated,... Read More

Genetic variation

Definition noun, plural: genetic variations Variations of genomes between members of species, or between groups of species... Read More

Nullisomy

Definition noun (genetics) A type of aneuploidy characterized by the loss of a pair of homologous... Read More

Zygote

Zygote Definition What is a zygote? A zygote is a fertilized eukaryotic cell. In biology, medical science, and other allied... Read More

Inversion

Definition noun, plural: inversions (general) The reversal of state, form, position, direction, order, or course, such as... Read More

Deoxyribonucleic acid

Deoxyribonucleic Acid (DNA) Definition A nucleic acid refers to any of the group of complex compounds made up of linear... 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

Gene

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

Asexual reproduction

Asexual Reproduction Definition What is asexual reproduction? Asexual reproduction is a mode of reproduction that does not... Read More

Chromatin

Chromatin Definition What is chromatin in a cell? Chromatin is a complex of nucleic acids (e.g. DNA or RNA) and proteins... Read More