Please enable JavaScript.

Coggle requires JavaScript to display documents.

Flowers & Heredity - Coggle Diagram

- - - - Ovary superior -> Inferior
      - Radial Symmetry (Irregularity)
      - Flowers indefinite in number of parts -> Flowers have few parts that are definite in number
  - - - Fruit Formation: Ovary, sometimes with other portions of flower develops into a fruit. Ovary wall , the Pericarp contains the Exocarp, Mesocarp, and Endocarp.
  - - - Active; Provides animal with nutrients, Long distance dispersal
      - Passive (Hooks, Catch on fur, Catch on hoof, Velcro)
- - - - Megasporangium is Nutritious Tissue = Nucellus, Nested doll, Integument, Megaspore wall, Megasporangium, Archegonium, Eggs
        
        Ex. Pine Ovule
    - - Two Integuments, Megasporangium = Nucellus, Megasporocyte reduced to one, Megaspore reduced to one and retained, Megagametophyte = Egg Sac, Furniculum
        
        Ex. Lily Ovule
  - - - Megasporangium closed in integuments
        
        Reduce # of Megasporocytes/Megasporangium to 1
        
        Survival of 1 megaspore
        
        Retention of Megaspores witihn the Megasporangium
        
        Endosporic Megagametophyte: Fertilization occurs in megaspore wall , adds extra layer of protection
        
        Modification of Megasporangium Apex
        
        1 more item...
- - - - Independent Assortment: During Metaphase 1, Orientation of Bivalents is random. During Metaphase 2, Orientation of Sister Chromatids is random. Possibilities are 2^n (n= # of chromosomes)
        
        Crossing Over: During Prophase 1, Synaptonemal complex forms. Mixes the genes present in homologous chromosomes. Results in new combinations not present. Usually atleast 1 chiasma occurs between every pair of homologous chromosomes.
        
        Sexual Reproduction: New combination of Alleles from each parent. Promotes heterozygosity. Advantages: Genetic diversity, bet-hedging to novel environments, Multiple deleterious alleles can be bunched together and eliminated, Escape host-parasite negative impacts.
  - - - Translocation: Exchange of parts between two nonhomologous chromosomes
      - Transposons: Movable genetic element, Jumping genes
      - Inversion: Piece rotates 180
      - Duplication: Part of the chromosome has doubled
      - Chromosome mutation: Deletion - Segments of chromosome are lost
      - Point mutation: Single nucleotide change