Genetics Test 1 Name Using the results of an F2 cross of true breeding strands o
ID: 194984 • Letter: G
Question
Genetics Test 1 Name Using the results of an F2 cross of true breeding strands of pea plants that produced (dominant) purple and (recessive) white flowers, answer the following questions (10 points total, 2 point each) X. /19. a) If you were to randomly pick 3 flowers from the F2 cross, how many combinations of flowers could you pick? 42 18 What are the chances of picking at least one white flower? 63/6Y What are the chances of picking two white flowers? /8 What are the chances of picking a purple and a white flower? eWhat are the chances of picking two purple flowers and a white flower? 1/8Explanation / Answer
True-breeding strands of pea plant with dominant purple flowers = PP
True-breeding strands of pea plant with recessive white flowers = pp
True-breeding strands of pea plant with dominant purple flowers gamete= P
True-breeding strands of pea plant with recessive white flowers gamete= p
F1 generation, all offsprings = Pp (Heterozygous pea plant with purple flowers)
F1 generation gametes = P, p
F1 generation, offsprings =
PP (Homozygous pea plant with purple flowers)
Pp (Heterozygous pea plant with purple flowers)
pP (Heterozygous pea plant with purple flowers)
pp (Homozygous pea plant with white flowers)
Answer a)
Since for 4 flowers, every 3 flowers are purple and 1 is white, we need to choose 3 so we have only 4 possible unique combinations, that is, either all 3 chosen are purple (wherein P1, P2, P3 will be chosen) or 2 purple & 1 white (wherein either P1,P2,W1, or P2,P3,W1 or P3,P1,W1 will be chosen)
Answer b)
Chances of picking at least one white flower = 3/4
Answer c)
Chances of picking two white flowers = 0
Answer d)
Chances of picking a purple and a white flower = 3/4
Answer e)
Chances of picking two purple and a white flower = 3/4
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