Question

In certain flowers, P= purple and p = white. Purple is completely dominant to white, but...

In certain flowers, P= purple and p = white. Purple is completely dominant to white, but is only 30% penetrant. What phenotypic ratios do you expect in the F2 if your parental cross is PP x pp (out of 100 offspring)?

Science   Biology   
0 0
Add a commentTranscribed image text
Next >

Homework Answers

Answer #1

Now F1 generation will have the genotype of Pp which will have 30% purple color flower will 70% will have white color flower ( as the penetrance is 30%)

In F2 generation genotype will be 25 PP 50 Pp and 25pp (out of 100 offspring)

as the penetrance is 30%

so there will be the phenotypic difference in heterozygous population of F2 generation

out of 50 Pp genotypic progeny (50 x30%), 15 will give purple color flower and rest (50-15) 35 will give white color flower

therefore, in F2 generation phenotypic ratio will be (purple: white) =(25+15): (25+35) = 2:3

0 0
Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Log In

Sign Up

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
Purple flowers (P) are completely dominant over white flowers (p) in pea plants. A plant that...
Purple flowers (P) are completely dominant over white flowers (p) in pea plants. A plant that is heterozygous for purple flowers (male) is crossed with another plant that has white flowers (female). Use a Punnett square to determine the expected genotypic and phenotypic ratios for the offspring. What is the purple pea plant's genotype? What is the white pea plant's genotype? What are the purple pea plant's gametes? What are the white pea plant's gametes? What is the expected genotypic...
1) Which cross would produce purple and white flowers in the offspring if purple flowers (P)...
1) Which cross would produce purple and white flowers in the offspring if purple flowers (P) are dominant to white flowers (p) in pea plants? 2) Which cross would produce only white flowers in the offspring if purple flowers (P) are dominant to white flowers (p) in pea plants?
In pea plants, purple flowers (P) are dominant to white flowers (p) and yellow peas (Y)...
In pea plants, purple flowers (P) are dominant to white flowers (p) and yellow peas (Y) are dominant to green peas (y). a) What are the possible genotypes and phenotypes for a cross between PpYY and ppYy pea plants? b) How many squares do you need to do a Punnett square analysis of this cross? c) Is a green pea outcome possible? Why or why not?
1. You cross two homozygous parental pea plants. One has purple flowers and is tall, the...
1. You cross two homozygous parental pea plants. One has purple flowers and is tall, the other has white flowers and is short. All of the F1 plants are purple and short. What are the genotypes of the parents and the F1? If you were to cross the F1 generation, what genotypic and phenotypic ratio would you expect to see in the offspring?
When Mendel crossed pea plants that were true breeding for purple flowers (PP) with pea plants...
When Mendel crossed pea plants that were true breeding for purple flowers (PP) with pea plants with white flowers (pp), all of the offspring had purple flowers.  When he let these offspring self-fertilize, he got purple and white second generation (F2) offspring in a phenotypic ratio of 3:1. But, we know that the genotypic ratio is really 1:2:1.  Why? (1 point)
Part A)i n plants, purple flower color is dominant to white flowers color. You crossed a...
Part A)i n plants, purple flower color is dominant to white flowers color. You crossed a white flowering plant with a purple flowering plant. Out of 236 plants in the offspring, 114 had white flowers and the other 122 had purple flowers. What were the genotypes of the parent plants? A. One plant was heterozygous white and the other heterozygous purple B. Both plants are homozygous C.Both plants are heterozygous D. One plant was homozygous white and the other heterozygous...
In the datura plant, purple flower color is controlled by a dominant allele P. White flowers...
In the datura plant, purple flower color is controlled by a dominant allele P. White flowers are found in plants homozygous for the recessive allele p. A heterozygous purple-flowered plant is self-fertilized by its own pollen and produces five seeds. a) Probability than any one seed will grow into a white-flowered plant? b) Probability that at least two of the five seeds will grow into white-flowered plants?
In a particular plant, a recessive allele is associated with white flowers (w). The dominant allele...
In a particular plant, a recessive allele is associated with white flowers (w). The dominant allele (W) results in purple flowers. Two plants are crossed. The offspring are made up of 175 plants with purple flowers and 161 plants with white flowers. Using the allele symbols shown above, the genotypes of the two parents are Ww x ww. This mating is an example of a/an ?
1. Cross a homozygous purple Plant (PP) with a homozygous white plans (PP). This is called...
1. Cross a homozygous purple Plant (PP) with a homozygous white plans (PP). This is called the P1 cross, and it will produce offspring called the F1 generation. You are given that purple color is dominant to white in this species. a) What is the genotype of the purple plant? b) What gametes can the purple plant make? c) What is the genotype of the white plant? d) What gametes can the white plant make? e) Create a Punnett Square...
1.In fruit flies, eye color is an X-linked trait. Red eyes (XR) are dominant over white...
1.In fruit flies, eye color is an X-linked trait. Red eyes (XR) are dominant over white eyes (Xr)A homozygous dominant female mates with a white-eyed male. What is the phenotypic ratio among males? a.1:0 (all male offspring will have red eyes) b.1:1 (half of the male offspring will have red eyes and half will have white eyes) c.0:1 (all male offspring will have white eyes) 2.In fruit flies, eye color is an X-linked trait. Red eyes (XR) are dominant over...
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT