Sunday 25 March 2012

Dominence , Co-Dominence, Incomplete Dominance

Results for Pea Plants:
-If you bred a purebred purple pea plant and a white you got all purple offspring.
-If you had a purebred purple and a half bred purple you got 6 purple and 2 white.
-If you bred the whites you always got white every time.
Therefore purple is Dominant and the white was recessive.

Reflection:You now know that the purple plants are dominant because when you cross the white pea plants with another the offspring are going to be all white, and when you cross a purebred purple pea plant with a white you get purple pea plants and white.

Results for Snapdragons:
-If you mix red with red you got all red
-If you mix red with pink you got 4 red, and 4 pink
-If you mix red with white you got all pink.
-If you mix pink and pink you got 4 pink, 2 red, and 2 white.
-If you mix pink and white you got 4 pink, 4 white.
-If you mix white with white you got all white.
Therefore the snapdragons are incomplete dominance

Reflection:
If you crossed white with red you got pink. If you crossed white with white you got white. If you crossed red with red you got red. This is an example of incomplete dominance because none of them are fighting to be shown the are all neutral.


Results for Lentils:
-If you mix the smaller seeds with the bigger seeds you get all mixed seeds.
-If you mix the smaller seeds with the smaller seeds you get all small seeds.
-If you mix the bigger seeds with the bigger seeds you get all big seeds.
-If you mix mixed seeds with mixed seeds you get 4 mixed, 2 of the smaller seeds, and 2 of the bigger seeds.
Therefore the lentils are co-dominance

Reflection: When combining the lentils unless you were crossing 2 of the same type of seeds you never got one dominant lentil shown. This is an example of co-dominance. Also when when you mix the mixed seeds and the mixed seeds you get 4 mixed seeds, 2 small seeds, and 2 big seeds. They are to stubborn so they are dominant together therefore they are co-dominant. 

http://www2.edc.org/weblabs/IncompleteDom/IncompleteDominanceMenu.html 





No comments:

Post a Comment