11:216:101 Lecture Notes - Lecture 5: Sex Organ, Liger, Hinny

• School: Rutgers University
• Department: Ecology, Evolution, and Natural Resources
• Course: 11:216:101
• Professor: S Sukhdeo

Document Summary

Animal or plant cannot be in physical contact with one another. Species that are similar will have different traits (different food) Hawthorn v apple maggot: maggot flies lay eggs in young fruit. Eggs hatch, larvae stage eats through fruit and flies away: hawthorn tree produces fruit native to us, hawthorn maggots, early settlers brought apple seeds from europe, 200 years ago 1800"s, hawthorn fruit, hawthorn maggots laid eggs. 2 species apple maggots flu: rare, never lay eggs in hawthorn they have adapted to apples, barrier time, hawthorn tree- fruit- mid august to mid november, polyploidy. Apple tree- fruit- late july to early september: plants result sympatric speciation, polyploidy- fusion of incomplete separation of chromosomes. Very common in flowering plants: somatic cell (brdy cell) (;:) one dad & one mom = 2n = diploid, both pairs (;)(:) sperm and egg; may carry 1 copy of each chromosome, humans can only have 2n.