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# Problem: In the organism under consideration, r* acts like r allele, except when homozygous (r*r*). From the information given below, work out the phenotypic and genotypic ratios for each of the crosses.Given: RR (red) x rr (white) → Rr (pink); andrr* x rr* → 3/4 white, 1/4 dead zygotes1. Rr x Rr2. Rr x rr3. Rr* x Rr*4. Rr* x rr*

###### Problem Details

In the organism under consideration, r* acts like r allele, except when homozygous (r*r*). From the information given below, work out the phenotypic and genotypic ratios for each of the crosses.

Given: RR (red) x rr (white) → Rr (pink); and

rr* x rr* → 3/4 white, 1/4 dead zygotes

1. Rr x Rr

2. Rr x rr

3. Rr* x Rr*

4. Rr* x rr*

What scientific concept do you need to know in order to solve this problem?

Our tutors have indicated that to solve this problem you will need to apply the Extensions to Mendel concept. You can view video lessons to learn Extensions to Mendel. Or if you need more Extensions to Mendel practice, you can also practice Extensions to Mendel practice problems.

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Our tutors rated the difficulty ofIn the organism under consideration, r* acts like r allele, ...as high difficulty.

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Our expert Biology tutor, Kaitlyn took 9 minutes and 35 seconds to solve this problem. You can follow their steps in the video explanation above.

What professor is this problem relevant for?

Based on our data, we think this problem is relevant for Professor Upadhyaya's class at USF.