Blue Flower
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what is the probability of a blue flower when crossing a green flower and a blue flower?
I put zero but that was the wrong answer and I don't understand why.
The question read as I wrote it. No other information was given.
Given the lack of information about the genotype of the flower, there is no way possible to answer the question.
But as an explanation, you would have to know what type of inheritance pattern the plant used, and whether blue was the dominant color.
If blue was dominant and green was recessive (complete dominance) then 100% of the offspring would be blue. But if the green was dominant and the blue was recessive, then 0 would have been correct.
There's also an other type of inheritance, incomplete dominance, where there's an intermediate phenotype between the two parents. If blue (B) was dominant and yellow (b) was the recessive form, then the heterozygous form (Bb) would be green. So crossing a blue with a green would give 50% blue. This would hold true if the yellow was dominant (Y) and blue was recessive (yy), and green was the heterozygous phenotype (Yy) as well. Yy x yy = 50% Yy and 50% yy.
So to be able to have answered the question, you would have had to know more about the genotypes of the parents and which inheritance pattern (complete dominance or incomplete) was being used.
This is a question I would bring up with your teacher, since adequate information to answer wasn't given.
