{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

VUBio110B-Sp'08-Mendelian Genetics 4 - thru polygenic- env't - Pedigree intro - POST

VUBio110B-Sp'08-Mendelian Genetics 4 - thru polygenic- env't - Pedigree intro - POST

Info icon This preview shows pages 1–8. Sign up to view the full content.

View Full Document Right Arrow Icon
SO FAR— Single gene – 2 or more alleles complete dominance incomplete dominance codominance multiple alleles pleiotropy What about traits controlled by more than one gene (polygenic) and environmental influence? epistasis (modified 9:3:3:1 ratios) quantitative traits environment
Image of page 1

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Epistasis • B_ = black • bb = brown • C_ = pigment deposited • cc = no pigment deposited Modified 9:3:3:1 = 9:3:4
Image of page 2
Other modified 9:3:3:1 ratios = gene interaction e.g., anthocyanin in flowers (purple pigment) 9 C_P_ = Flowers colored 3 C_pp = Flowers white 3 ccP_ = Flowers white 1 ccpp = Flowers white = complementation Modified 9:3:3:1 = 9:7 http://www.ndsu.nodak.edu/instruct/mcclean/plsc431/mendel/mendel6.htm
Image of page 3

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Other modified 9:3:3:1 ratios = gene interaction e.g., kernel color in wheat 9 A_B_ = colored kernels 3 A_bb = colored kernels 3 aaB_ = colored kernels 1 aabb = colorless kernels = duplicate gene action Modified 9:3:3:1 = 15:1 http://www.ndsu.nodak.edu/instruct/mcclean/plsc431/mendel/mendel6.htm
Image of page 4
Quantitative Traits (continuous vs. discrete)
Image of page 5

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Genotype + Environment produces a range of phenotypes
Image of page 6
Results of polygenic inheritance (and environment!)
Image of page 7

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Image of page 8
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern