High School

We appreciate your visit to The horticulturalist crosses two geraniums from the F1 generation Look at the Punnett square to see this cross What ratio of red to white flowering. This page offers clear insights and highlights the essential aspects of the topic. Our goal is to provide a helpful and engaging learning experience. Explore the content and find the answers you need!

The horticulturalist crosses two geraniums from the F1 generation. Look at the Punnett square to see this cross. What ratio of red- to white-flowering plants would you expect to see in the phenotypes of the F2 generation?

Answer :

When crossing two F1 generation geraniums, we would expect a 3:1 phenotypic ratio of red- to white-flowering plants in the F2 generation, indicating three red-flowering plants for every white-flowering plant.

The question asks about the expected ratio of red- to white-flowering plants in the phenotypes of the F2 generation when two geraniums from the F1 generation are crossed. This involves using a Punnett square to analyze a monohybrid cross with a dominant-recessive inheritance pattern.

In this scenario, assume red (R) is dominant over white (r). The F1 generation, having both red-flowering geraniums, would be heterozygous (Rr). When these F1 geraniums (Rr x Rr) are crossed, the Punnett square would look as follows:

  • RR (Red)
  • Rr (Red)
  • Rr (Red)
  • rr (White)

This results in a phenotypic ratio of approximately 3:1, where there are three red-flowering plants for every one white-flowering plant.

Thanks for taking the time to read The horticulturalist crosses two geraniums from the F1 generation Look at the Punnett square to see this cross What ratio of red to white flowering. We hope the insights shared have been valuable and enhanced your understanding of the topic. Don�t hesitate to browse our website for more informative and engaging content!

Rewritten by : Barada

Hi,

In Geranium plants red flowers is given by the allele R that is dominant (so RR or Rr ) genotype will produce red flowers.

If we talk about the attached punnet square which i took from the exercise book, you can see that there was a cross made between two plants with heterozygous genotype for red flowers.

P1: Rr X Rr

Gametes: R: r : R : r

F1: RR: Rr: Rr: rr

so there is 3: 1 in F1 offspring for red to white flowers.

Now the question is about f2 generation, when we cross F1 generation suppose we do a cross of Rr and rr from F1 generations let us see what happens.

F1: Rr: rr

Gametes: R: r: r: R

F2 : Rr
: rr: Rr: rr

Rr: Red flowers

rr: White flowers:

So the ratio in F2 generation will be 2 red : 2 white. Please see attached punnet squares (first one for question) and the second one of F1 cross for better understanding.

Hope it help!