Chapter 10.3 Gene Linkage and Polyploidy

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Presentation transcript:

Chapter 10.3 Gene Linkage and Polyploidy March 4, 2015

Linked Genes Genes located close to each other on the same chromosome

Gene Linkage Linked genes travel together Exception to Mendel’s law of independent assortment

Examples of Linked Genes

Chromosome Maps Map shows the relative position of each gene. Genes that are far apart are more likely to crossover.

Polyploidy Polyploidy is the occurrence of one or more extra sets of all chromosomes in an organism. Approximately 30% of flowers are polyploidy Strawberries are octoploidy (8n)

Polyploidy Horticultural important plants are forced to polyploidy to increase the size and flavor of flowers and fruits and overall vigor of the plants. Polyploidy is uncommon in animals.