Question

if you cross a round (rr) plant with a wrinkled plant (rr), what will
the offspring be and what percent?

1. establish the genotypes _ x _

of the parents:

1. set up the square.

1. determine the phenotypic percentages:

___ % are round
___ % are wrinkled.

Explanation:

Question 8

The problem states we cross a round plant with genotype \( Rr \) and a wrinkled plant with genotype \( rr \). So the parent genotypes are \( Rr \) and \( rr \).

To set up the Punnett square, we list the possible gametes from each parent. The \( Rr \) parent can produce \( R \) and \( r \) gametes, and the \( rr \) parent can only produce \( r \) gametes. The Punnett square is set up as follows:

	\( R \)	\( r \)
\( r \)	\( Rr \)	\( rr \)

Step 1: Count the genotypes

From the Punnett square, we have two \( Rr \) (round) and two \( rr \) (wrinkled) offspring.

Step 2: Calculate percentages

Total offspring = 4. Percentage of round (\( Rr \)): \(\frac{2}{4} \times 100 = 50\%\). Percentage of wrinkled (\( rr \)): \(\frac{2}{4} \times 100 = 50\%\).

Answer:

\( Rr \) x \( rr \)

Question 9