Quantcast

Got Homework?

Connect with other students for help. It's a free community.

  • across
    MIT Grad Student
    Online now
  • laura*
    Helped 1,000 students
    Online now
  • Hero
    College Math Guru
    Online now

Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing

MidoriKeehl

In pea plants purple flowers are dominant over white flowers. If you cross a heterozygous purple flower plant with a white flower plant what are the expected genotypes and phenotypes of the offspring? Report your answer for both genotype and phenotype stating the fractions of each that are expected

  • one year ago
  • one year ago

  • This Question is Closed
  1. blues
    Best Response
    You've already chosen the best response.
    Medals 1

    The first step is to write out the parents genotypes. In this case, it tells you that the purple parent is heterozygous, meaning that it has one allele of each type. So Pp. Furthermore, it tells you that purple is dominant over white, so if the white parent had even one dominant allele it would be purple. Its phenotype is pp. Those are what you should use when you set up your Punnet Square. Hopefully that is enough to get you started. :)

    • one year ago
  2. MidoriKeehl
    Best Response
    You've already chosen the best response.
    Medals 0

    Can you help me with the fraction part? o:

    • one year ago
  3. blues
    Best Response
    You've already chosen the best response.
    Medals 1

    Before you can get to the fractions, you have to do a Punnet square. Have you already done that part on your own or shall we work through it here?

    • one year ago
  4. MidoriKeehl
    Best Response
    You've already chosen the best response.
    Medals 0

    It would be Pp and ww so it would be like.. so would it be like 50/50?

    • one year ago
  5. MidoriKeehl
    Best Response
    You've already chosen the best response.
    Medals 0

    |dw:1355804031817:dw|

    • one year ago
  6. MidoriKeehl
    Best Response
    You've already chosen the best response.
    Medals 0

    sorry I drew it but it didnt come out on the other one

    • one year ago
  7. blues
    Best Response
    You've already chosen the best response.
    Medals 1

    That is exactly right. The only slightly, erm, irregular thing about it is that you have assigned a big P for the dominant purple allele and a lower case w for the recessive white allele. Tradition has it that the alleles are both the same letter but the dominant one is capital P and the recessive one is lowercase p. That is just a matter of naming. And the ratios are quite correct. Using your notation, the 1/2 Pw offspring are heterozygous - they have a dominant allele, P, so they will be purple. While the 1/2 pw offspring have only the recessive allele, so they will all be white.

    • one year ago
  8. MidoriKeehl
    Best Response
    You've already chosen the best response.
    Medals 0

    Okay, thank you very much!

    • one year ago
  9. blues
    Best Response
    You've already chosen the best response.
    Medals 1

    Glad to be helpful.

    • one year ago
  10. MidoriKeehl
    Best Response
    You've already chosen the best response.
    Medals 0

    What about the genotype part? or is it the same thing?

    • one year ago
    • Attachments:

See more questions >>>

Your question is ready. Sign up for free to start getting answers.

spraguer (Moderator)
5 → View Detailed Profile

is replying to Can someone tell me what button the professor is hitting...

23

  • Teamwork 19 Teammate
  • Problem Solving 19 Hero
  • You have blocked this person.
  • ✔ You're a fan Checking fan status...

Thanks for being so helpful in mathematics. If you are getting quality help, make sure you spread the word about OpenStudy.

This is the testimonial you wrote.
You haven't written a testimonial for Owlfred.