Genetic Linkage & mapping in eukaryotes Flashcards
Genetic map
Syntery
Means that two or more genes are located on the same chromosome (Physically linked together)
Genetic linkage (linkage)
Genes that are close together on the same chromosome tend to be transmitted as a unit
_______________ may produce recombinant genotype
Crossing over
What are the two ways that genetic recombination occurs in two ways?
- When two or more genes are linked on the same chromosomes crossing over during meiosis can result in genetic recombination
- When two or more genes are on different chromosomes the independent assortment of those chromosomes during meiosis can result in genetic recombination
Recombinant offspring
Recombinant offspring are prodcued by the exchange of DNA between two homolgoud chromosomes during meiosis in one or both parents leading to a novel combination of genetic material
_____________ carry chromosomes that are the product of crossing over
Recombinant offspring
The likelihood of crossing over between two genes depends on the __________ them
Distance (If two genes are far apart the crossing over is likely to occur & if they close together its not)
A ___________ can be used to distingusih between linkage & independent assortment
Chi square test
Genetic mapping
Determines the linear order & distance of separation amomng genes that are linked to each other on the same chromosome
Locus
Where the gene is found within a chromosome
The __________ of recombination between two genes is used to complete the map distance between them on a chromosome
If two genes are close togetherfew ______________ offspring will happen & if they are far apart alot will occur
Few recombinant
Map distance
Number of recombinant offspring divided by the total number of offspring x 100
Mapping functions
Describes the quantitative relationship between recombination frequencies & physical distance along chromosome
