110 results found

Search Results for: homologous

Homologous chromosome

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

Homologous

Homologous Definition What is homologous? In general science, the word “homologous” is used to show a degree of... Read More

Homologous structures

Homologous Structures Definition What are homologous structures? Before we define that, let us first identify the meaning... Read More

Meiosis

What is Meiosis? A simple definition of meiosis would be is this: meiosis is the process of cell division that results in... Read More

Recombination DNA repair

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

Analogous

In evolutionary biology, the meaning of analogous is “having similarities in functions but different evolutionary... 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

Chromosomal crossover

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

Polyploid

Definition noun, plural: polyploids A cell or an organism having a genome with multiple (more than two) sets of homologous... Read More

Pachytene

Definition noun The stage after zygotene and precedes diplotene, and is highlighted by homologous chromosomes shortening,... Read More

Analogous structures

In evolutionary biology, analogous structures are defined as biological structures having similar or corresponding functions... 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

Metaphase I

Definition noun The second stage in the first meiotic division after prophase I, and highlights the alignment of paired... Read More

Haploid

In biology, haploid pertains to a condition, a cell, or an organism that has half of the usual complete set of chromosomes... Read More

Diplotene

Definition noun The late stage of prophase I of meiosis I in which homologous chromosome pairs begin to separate and move... Read More

Anaphase I

Definition noun The third stage in the first meiotic division after prophase I, and highlights the separation of paired... Read More

Prophase I

Definition noun The first stage in the first meiotic division of meiosis characterized by having five sub-stages namely... Read More

Zygotene

Definition noun, plural: zygotenes The sub-stage of prophase I of meiosis I in which the homologous chromosomes pair or come... Read More

Zygosity

Definition noun (genetics) The degree of similarity or the dissimilarity of the DNA sequences in specific coding segments,... Read More

Diploid

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

Homogenous

What is homogenous? What does homogenous mean? The word homogenous has been derived from two Greek words that are... Read More

Heterozygote

Definition noun, plural: heterozygotes A nucleus, cell or organism possessing two different alleles for a particular... Read More

Non-sister chromatid

Definition noun, plural: non-sister chromatids Either of the two chromatids of any of the paired (homologous)... Read More

Divergent evolution

Divergent evolution definition Divergent evolution refers to the process by which interbreeding species diverged into two... Read More

Ploidy

Definition noun, plural: ploidies The number of sets of homologous chromosomes that make up the genome of a cell or an... Read More

Homozygote

Definition noun, plural: homozygotes A nucleus, cell or organism where the alleles for a particular gene on each chromosome... Read More

Synaptonemal complex

Definition noun, plural: synaptonemal complexes A complex protein structure that spans the region between the paired... 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

Evolution

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

Independent Assortment and Crossing Over

Reviewed by: Mary Anne Clark, Ph.D. The previous tutorial investigates the process of meiosis, where... Read More

Polypoid

Definition noun (genetics) A cell or an organism containing more than two sets of homologous... Read More

Nullisomy

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

Chromomere

Definition noun, plural: chromomeres (genetics) One of the beadlike granules that are arranged in a linear series along the... Read More

Bivalent

Definition noun, plural: bivalents (genetics) A pair of homologous chromosomes in synapsis during... Read More

Chromosomes X and Y and Sex Determination

Reviewed by: Mary Anne Clark, Ph.D. In humans, the normal chromosome complement is 46, consisting of 22 pairs of... Read More

Polymorphism

Polymorphism Definition The occurrence of two or more different forms or morphs in the population of a species is referred... Read More

Phenotype

Phenotype refers to the observable characteristics of an organism as a multifactorial consequence of genetic traits and... 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

Chromosome Mutations

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

Analogy

Definition noun, plural: analogies (evolutionary biology) Structural or behavioural similarity in terms of functions between... Read More