Questions: 25 If you cross two heterozygous Yy pea plants, what proportion of the offspring will be the dominant color yellow? Multiple Choice O 0% O 50% • 25% O 75% O 100% < Prev 25 of 28 ::: Score answer >

The answer is 75%.

Explanation:

When crossing two heterozygous Yy pea plants, we can use a Punnett square to determine the possible genotypes of the offspring. Each parent can pass on either a Y (dominant allele for yellow color) or a y (recessive allele for green color).

The Punnett square for this cross is as follows:

       Y   |   y
     ---------------
Y  |  YY  |  Yy
     ---------------
y  |  Yy  |  yy

From the Punnett square, we can see the following possible genotypes for the offspring:

• YY: 1 out of 4 (25%)
• Yy: 2 out of 4 (50%)
• yy: 1 out of 4 (25%)

The dominant color yellow is expressed in both the YY and Yy genotypes. Therefore, the proportion of offspring that will be yellow is:

YY (25%) + Yy (50%) = 75%

Thus, 75% of the offspring will exhibit the dominant yellow color.