Question

a plant that has round and yellow seeds (rryy) is crossed with a plant that has round and yellow seeds (rryy). what is the ratio of the offspring that will have round and yellow seeds? key: r = round r = wrinkled y = yellow y = green 1:16 3:16 8:16 9:16

Explanation:

Step1: Analyze the cross for each trait

For the shape trait (R/r): \( Rr \times Rr \). The Punnett square gives \( RR:Rr:rr = 1:2:1 \), so the probability of round (R_) is \( \frac{3}{4} \) (since \( RR \) and \( Rr \) are round).

For the color trait (Y/y): \( Yy \times Yy \). The Punnett square gives \( YY:Yy:yy = 1:2:1 \), so the probability of yellow (Y_) is \( \frac{3}{4} \) (since \( YY \) and \( Yy \) are yellow).

Step2: Combine the probabilities

To find the probability of round and yellow (R_ and Y_), we multiply the probabilities of each trait (since they are independent). So \( \frac{3}{4} \times \frac{3}{4} = \frac{9}{16} \). This means the ratio of offspring with round and yellow seeds is \( 9:16 \).

Answer:

9:16