Monday, 11 April 2011

Tutorial 1: Self fertilization and Cross fertilization

With the knowledge that the red skin gene and the yellow eye gene assort independently, ur task is to continue this cross by interbreeding F1 individuals to produce the F2  generation.


1.     The differences between cross-fertilization and self fertilization



Self-fertilization
Cross- fertilization
·        Occur when want to produce F1 generation
·        The sperm fertilizes the eggs that in the same or different flower of a plant.
·        The offspring derived from one pea plant.

·        Involving one plant of the same generation.
  • Lees variation of the offspring
  • Stamen are covered by protective petal, so self fertilization are easily occur.

·        Occur when want to produce F2 generation
·        The sperm of one flower fertilizes the eggs of  another plant. 
·        The offspring derived from two different types of true breeding of pea plants.

·        Involving  2 plant.
·        More variation of the offspring.
·        Large flower of the pea plant make it possible to remove stamens from the flower preventing self fertilization.

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