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What would be the result of a cross between a full/green (CCYY) plant and a constricted/yellow...

What would be the result of a cross between a full/green (CCYY) plant and a constricted/yellow plant (ccyy)? Provide the resulting genotypes and phenotypic ratios of the F2 generation.

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Answer #1

CCYY x ccyy

The F1 generation for this cross would be CcYy, as the possible gametes for each parent are CY and cy respectively.

The F2 generation from an F1 test cross would look like:

CY Cy cY cy
CY CCYY (full, green) CCYy (full, green) CcYY (full, green) CcYy (full, green)
Cy CCYy (full, green) CCyy (full, yellow) CcYy (full, green) Ccyy (full, yellow)
cY CcYY (full, green) CcYy (full, green) ccYY (constricted, green) ccYy (constricted, green)
cy CcYy (full, green) Ccyy (full, yellow) ccYy (constricted, green) ccyy (constricted, yellow)

The phenotypic ratio is 9 (full, green) : 3 (constricted, green) : 3 (full, yellow) : 1 (constricted, yellow)

The genotypic ratio is 1:2:1:2:4:2:1:2:1

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