Search Results for: multiple alleles
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
Incomplete dominance
Incomplete Dominance Definition After Gregor Mendel discovered inheritance laws, the term ''incomplete dominance'' was... Read More
Law of Segregation
Mendel’s Laws of Inheritance The father of genetics, Gregor Mendel, reported his findings in 1860 that initially were... 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
Homozygous
Homozygous Definition Diploid organisms that have a genotype of identical alleles for a trait or phenotype at a specific... Read More
Codominance
Codominance Definition Codominance is a form of inheritance wherein the alleles of a gene pair in a heterozygote are fully... Read More
Non-Mendelian Inheritance
Reviewed by: Mary Anne Clark, Ph.D. The inheritance patterns seen in Mendel's monohybrid and dihybrid crosses... 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
Genotypic ratio
Genotypic Ratio Definition To understand 'Genotypic ratio', let us first understand the terms: 'Genotype' and 'Phenotype'.... Read More
Phenotypic ratio
Phenotypic Ratio Definition How would one define phenotypic ratio? The correlation between the amount of offspring that... Read More
Pleiotropy
Pleiotropy Definition When one single gene starts affecting multiple traits of living organisms, this phenomenon is known... Read More
Inherited traits
What are Inherited Traits? The characteristics or traits that are passed from parents to offspring are known as inherited... 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
Law of Independent Assortment
Law of Independent Assortment Definition noun (genetics) Mendelian law stating that for every pair of unit factors, each... Read More
Neutral mutation
Neutral Mutation Definition What is a neutral mutation? Neutral mutations are the alterations in the DNA that are... 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
Genetics – Lesson Outline & Worksheets
Topics Modules Quizzes/Worksheets Description Introduction to Genetics Genetics - Definition:... Read More
Sex-linked trait
Definition of Sex-Linked Traits A sex-linked trait is an observable characteristic of an organism that is influenced by the... 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
Missense mutation
What is a missense mutation? Literally speaking, a mutation that changes the meaning of the encoded gene sequence is the... Read More
Mendel’s Law & Mendelian Genetics
Reviewed by: Mary Anne Clark, Ph.D. The previous tutorial, Dominance, has described Gregor Mendel’s law of... Read More
Recombination DNA repair
Recombination DNA Repair Definition Recombination DNA repair is a biological reparative process in response to DNA damage... Read More
Chromatids
Chromatid Definition Chromatids are found inside our cells. Chromatids are condensed chromosomes distinguishable during... 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
Monogenic trait
Definition noun A trait produced by the effect of a gene or an allele Supplement A monogenic trait is a trait produced... Read More
Genetic Mutations
Reviewed by: Mary Anne Clark, Ph.D. Genetic Mutations Genetic mutations are inherited variations in an... Read More