Yellow squash Y is dominant over white squash y. A cross between YY and yy occurs. What are the phenotypic percentages?

By crossing a yellow squash (YY)  with a white squash (yy) , the phenotypic percentage of the offspring is 100% yellow squash (Yy).

Explanation:

The crossing of two pure lines -with identical alleles for a trait- dominant and recessive produces a hybrid or heterozygous offspring, with different alleles for that trait.

In this case, the yellow squash is homozygous dominant, while the white squash is recessive, obviously homozygous.

YY  X  yy

Alleles      Y     Y

y             Yy    Yy

y             Yy    Yy

All the offspring will have a Yy genotype and a single yellow squash phenotype for 100% of them.

fire could start, buildings collapsing, and ash falling from the sky.

explanation:

this is because the buildings or plants could catch on fire and the buildings would most likely collapse. lastly ash would fall because all the burning would cause ash to fall from the sky.

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