Genetics Test 1 Name 17. When crossing pea plantiet flower is dominant to a whit
ID: 194972 • Letter: G
Question
Genetics Test 1 Name 17. When crossing pea plantiet flower is dominant to a white flower. Attu sing pea plants, an axial flower position is dominant to a terminal flower position and a violet flower is dominant to a white flower. A true breeding strand of a plant with an axial flower position and a violent flower is cross pollinated with a true breeding strand of a plant with a terminal flower position and a white flower. Answer the following questions. (10 points total, 2 points each) a) Which phenotypes would you expect among the 1024 offspring? b) How many of each phenotype would you expect? c) Which genotypes would you expect among the 1024 offspring? d) How many of each genotype would you expect? e) What is the resulting mendelian ratio of the above cross? G.3Explanation / Answer
Axial Flower Position (AA, Aa, aA) is dominant to Terminal Flower Position (aa)
Violet Flower Colour (VV, Vv, vV) is dominant to White Flower Colour (vv)
True-breeding Axial Flower Position + Violet Flower Colour = AAVV
True-breeding Terminal Flower Position + White Flower Colour = aavv
Answer a)
As per Mendelian laws of Segregation, Independent Assortment and Dominance:
True-breeding Axial Flower Position + Violet Flower Colour gametes = AV
True-breeding Terminal Flower Position + White Flower Colour gametes = av
Thus, all 1024 offsprings genotype = AaVv
Thus, all 1024 offsprings phenotype = Axial Flower Position + Violet Flower Colour
Answer b)
All 1024 offsprings phenotype = Axial Flower Position + Violet Flower Colour
Answer c)
All 1024 offsprings genotype = AaVv
Answer d)
All 1024 offsprings genotype = AaVv
Answer e)
There is no mendelian ratio as all the offsprings have the same genotype and consequently the same phenotype.
Related Questions
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.