Question

question 5
go to https://askabiologist.asu.edu/games-sims/genetics-game/play-punnett-squares.html?mode=findratiospercentages
keep clicking
ew challenge\ button until you see the picture, below:

1. complete the punnett square
2. complete the genotype ratio and percentages
3. complete the phenotype ratio and percentages

which of the following shows a correct genotype percentage and the phenotype ratio for this punnet square?
o a 0% rr and 50% round
o b 1:2:1 green and 50%
o c 50% wrinkled and 50% smooth
o d 0% rr and 1:1

Explanation:

Step1: Determine the gametes

The parent with genotype \(Rr\) can produce gametes \(R\) and \(r\). The parent with genotype \(rr\) can produce gametes \(r\) and \(r\).

Step2: Create the Punnett square

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

Step3: Calculate genotype ratios

There are 2 \(Rr\) and 2 \(rr\) out of 4 offspring. So, \(Rr:rr = 1:1\). The percentage of \(RR\) is \(0\%\) (since there are no \(RR\) offspring).

Step4: Calculate phenotype ratios

Since \(R\) (round) is dominant over \(r\) (wrinkled), \(Rr\) is round and \(rr\) is wrinkled. So, round:wrinkled \(= 1:1\)

Answer:

d. 0% \(RR\) and \(1:1\)