8.3 & 8.4 AP Biology Lecture Genes are carried on Chromosomes.

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Presentation transcript:

8.3 & 8.4 AP Biology Lecture Genes are carried on Chromosomes

LOCUS

Genetic Linkage Association between genes on the same chromosome Do not show random assortment The closer the genes are, the LOWER the frequency of recombination (crossing over) Studied by Morgan in Drosophila fruit flies

Sex Linkage Inheritance of a gene that is carried on the X chromosome Hemophilia, color blindness, baldness etc.

Plasmid Plasmids are small circular pieces of DNA that have genes for: Unusual metabolic activities (to clean up oil spills) Antibiotic resistance (major threat to human health) Plasmids can be transferred from one bacteria cell to another