Genetic Recombination and Gene Mapping

Genetic Recombination

The process by which genes on chromosomes are rearranged through crossing over during meiosis.

Thomas Hunt Morgan

A geneticist known for his work on fruit fly genetics and for demonstrating that genes are located on chromosomes.

Crossing Over

A process during meiosis where chromosomes exchange segments, leading to genetic recombination.

Vestigial Wings

A mutation in fruit flies resulting in smaller, non-functional wings.

Punnett Square

A diagram used to predict the outcome of a genetic cross by displaying the possible gametes of the parents.

Parental Phenotypes

The phenotypes of offspring that resemble the parents with no genetic recombination.

Recombinant Phenotypes

The phenotypes of offspring that result from genetic recombination.

Map Units

A unit of measure for the distance between genes on a chromosome, based on recombination frequency.

Frequency of Recombination

The percentage of recombinant offspring produced in a genetic cross, indicating the distance between genes on chromosomes.

Alfred Sturtevant

A student of Thomas Hunt Morgan who contributed to understanding genetic mapping and recombination.

Independent Assortment

The principle that genes located on different chromosomes assort independently during gamete formation.

Meiosis

The type of cell division that produces gametes with half the number of chromosomes, leading to genetic variation.

F1 Generation

The first generation of offspring from a cross of two parent organisms.

Cinnabar Gene

A gene in fruit flies associated with eye coloration.

Dominant Trait

A genetic trait that masks the presence of another trait in a heterozygous individual.

Homozygous Recessive

An organism that has two identical recessive alleles for a specific trait.

Chromosome Mapping

The process of determining the relative positions of genes on a chromosome.