Question

Using Mendel's flower color (purple is dominant, white is recessive) and pea color (yellow is dominant, green is recessive). If two plants that are purple flower, yellow peas and are both heterozygous for each gene are crossed, what is the probability that the first two offspring will have purple flowers? For proper grading, please give your answer as a percentage, but do not enter the percent sign. That is, if your answer is 0.25 or 25%, just enter 25.

Answer 1

75 percent

Step-by-step explanation:

For this, you need to do the cross.

First, recognize the F0 or parents alleles.

Purple is dominant, we will use a capital letter: P

And white is recessive: p

Yellow is dominant: Y

And green is recessive: y

Both heterozygous for each gene, this means both alleles are

PpYy

The cross will be

PpYy x PpYy = PP YY, Pp Yy, pP yY, and pp yy

This means you have 25% of having PPYY, 50% of having PpYy and 25% of having ppyy.

As a phenotype, every time the dominant allele appears will show the dominant alleles: Purple and yellow.

So, you have 75% of having purple flowers and yellow pea.