Amanda N. Wavrin Week 2
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Objective
- We are determining how color is inhertited in these test flowers.
- We are working with a single gene system.
- Alleles are versions of genes.
observations
- When crossing a pure-breeding green (Green-1) flower with a pure-breeding white flower all of the off spring were green. This would indicate that green is dominant.
- When I self crossed one of the previous off spring flowers, it resulted in 19 green flowers and 7 whte flowers. This shows that self crossed flower was heterzygous. When I repeated this cross a second time, it resulted in 4 white flowers and 15green flowers.
- When I continued to mutate one of the white flowers(2-9), all of the off spring were white.
- I mutated a white flower (2-21) again and it resulted in all white off spring.
- I mutated a white flower (2-2), resulted in all white off spring.
- I mutated a white flower (2-14)for the fourth time, resulted in all white off spring.
- When I mutated white flower 2-17 the results were 14 white flowers, one mutant yellow flower and one mutnatred flower.
- When I crossed the Yellow and Red mutants, it resulted in 6 orange mutants, 10 White, 8 Red, and 4 Yellow. When I repeated this cross, it resulted in 4 Yellow mutants, 4 Red, 7 orange, and 5 White.
- Crossed Green-2 and Mutated red, resulted in 7 Purple, 9 Orange, 8 Yellow, 4 Blue.
- When self crossed purple flower, resultd in 9 purple flowers,5 red flowers, 5 blue flowers.
- Self crossed another purple flower, resulted in 9 purple flowers, 8 blue flowers,8 red.
- Crossed Blue and Purple, resulted in 10 purple, 14 blue.
- Crossed purple and Gree2, resulted in 9 Purple, 4 Blue,3 Orange, 4 Green.
- Crossed orange and white, resulted in 13 Orange, 7 red.
- Self crossed blue, all blue off spring. Repeated.
- Crossed two Blue, all blue off spring. Repeated.
- Self cross green2- result in blue, yellow, and green. Codominance.
- Crossed Green1 and Red, resulted in 15 black flowers and 7 green flowers.
- Crossed prebreeding red and green1, resulted in all black. Incomplete dominance.
Answers to Aipotu Genetics Questions
A) Phenotypes and Corresponding Genotypes
- These are the different alleles: Cg, Cw, Cr, Cb, Cy. Different combinations of the alleles produce different colors:
- Green1- CgCg
- White- CwCw
- Red- CrCr
- Blue- CbCb
- Orange- CrCy
- Yellow- CyCy
- Purple- CrCb
- Black- CrCg
- Green2- CyCb
B)
- Green1 is dominant to blue
- Green1 is dominant to white
- Green1 is dominant to gree2
- Green1 is dominant to yellow
- Green1 and red exhibit incomplete dominance
- White is recessive
- Green and blue are codominant
C) List of colors produced by allelic combinations
- CgCg-Green1
- CgCw-Green1
- CgCr-Black
- CgCb-Green1
- CgCy-Green1
- CwCw-White
- CwCr-Red
- CwCb-Blue
- CwCy-Yellow
- CrCr-Red
- CrCb-Purple
- CrCy-Orange
- CbCb-Blue
- CbCy-Green2
- CyCy-Yellow
D)The four starting organisms:
- Green1- CgCg
- Green2- CyCb
- Red- CrCw
- White- CwCw
E) Purple Flower- CbCr
F) No, you cannot construct a pure-breeding purple flower with the starting set of organisms. You need a mutation to get a pure-breeding purple flower.
G) It is easier to mutate from color to white.
New colors found by mutation:
- Purple
- Black
- Orange
- Yellow
- Blue
These colors are also attainable through cross-breeding.
H) I chose a mutant black flower, made it pure-breeding, and crossed it with a pure-breeding white flower.
- All black offspring
- Black mutant is dominant to white