High School

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A horticulturalist wants to produce geraniums with specific characteristics.

She knows that the trait of red flowers is governed by the allele R (RR and Rr) and the trait of white flowers is governed by the allele r (rr).

The horticulturalist crosses two geraniums from the F1 generation.

Look at the Punnett square to see this cross.

\[
\begin{array}{c|c|c}
& R & r \\
\hline
R & RR & Rr \\
r & Rr & rr \\
\end{array}
\]

Which ratio of red-to-white flowering plants would she expect to see in the phenotypes of the F2 generation?

A. All red
B. 3 red : 1 white
C. 1 red : 3 white
D. 2 red : 2 white

Answer :

Answer: 2 red : 2 white

Explanation:

I know

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Rewritten by : Barada

Yo,

In Geranium plant life red vegetation is given by using the allele R this is dominant (so RR or Rr ) genotype will produce crimson plant life.

If we communicate approximately the connected punnet square which i took from the workout e book, you could see that there was a cross made among vegetation with heterozygous genotype for red flora.

P1: Rr X Rr

Gametes: R: r : R : r

F1: RR: Rr: Rr: rr

so there is three: 1 in F1 offspring for red to white plant life.

Now the query is set f2 technology, while we cross F1 generation suppose we do a move of Rr and rr from F1 generations allow us to see what takes place.

F1: Rr: rr

Gametes: R: r: r: R

F2 : Rr : rr: Rr: rr

Rr: purple flowers

rr: White flora:

So the ratio in F2 era might be 2 crimson : 2 white. Please see connected punnet squares (first one for query) and the second of F1 move for better know-how.

I'm hoping that this will benefit you, so from my assumption and study it'd be 2 crimson : 2 white, if this is indeed the one i'm thinking of since nothing else was provided, if not please correct me.