Question

2. Incomplete Dominance Problem

A red carnation is crossed with a white carnation. Neither one is
dominate over the other. This means that when crossed, their offspring
can show a pink flower. The parent generation genotypes are: CR CR
and CW CW (RED x WHITE).
An offspring showing pink flowers (CR CW) from the parent generation
is now being bred with another pink flower (CR CW). What color will
this new generation’s offspring show?
Part 1: Draw and fill in your own Punnett square-
Part 2- Determine genotype
CRCW x CRCW
Part 3- Determine phenotype
CRCW x CRCW
Part 4- Explain your results:
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Part 5- Go further choose one of the offspring from the cross. Now
explain what would happen when your chosen offspring was crossed
with a pink flower (CRCW).
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Answer 1

Part 1: Punnett Square:

| C R | C W |

--|------|------|

C R| CRCR | CRCW |

--|------|------|

C W| CRCW | CWCW |

Part 2: The genotype of CRCW x CRCW would be 25% CRCR, 50% CRCW, and 25% CWCW.

Part 3: The phenotype of CRCW x CRCW would be 25% red, 50% pink, and 25% white.

Part 4: These results show that the pink flower color is not a stable or true-breeding trait because it can produce both red and white offspring in the next generation. The offspring will inherit one allele from each parent and the combination determines the flower color.

Part 5: If the chosen offspring is CRCW, and it is crossed with a pink flower (CRCW), then the offspring will have the same probability as the parent generation. There will be a 25% chance of getting a red flower, 50% chance of getting a pink flower, and 25% chance of getting a white flower.

Step-by-step explanation: