{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

Bio. 203 Lecture 3 and 4 RSA 1-26 -09

Bio. 203 Lecture 3 and 4 RSA 1-26 -09 - Chromosomes contain...

Info icon This preview shows pages 1–14. Sign up to view the full content.

View Full Document Right Arrow Icon
Walther Flemming Chromosomes contain the units of heredity
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
Walter Sutton 1902 Sutton Bovery Hypothesis Chromosomes contain the units of heredity Mendel's particles parallel the behavior of chromosomes at meiosis 1913 Elinor Carothers heteromorphic chromosome pair in Grasshoper
Image of page 2
Thomas Hunt Morgan 1910 Morgan noticed one fruit fly with a distinctive characteristic: white eyes instead of red. Red XXR X XXr white F 1 Red dominant F2 Females: XR XR , XR Xr red-eye female Xr X r white-eyed females F2 Males : XR Y red-eye male Xr Y white-eyed male
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
1922 Alfred Blakeslee 12 stains each containing a different extra chromosomes and 12 different appearances. Jimsonweed
Image of page 4
F 1  x F 1 F 2   Ratio 3:1 Dihybrid cross: F2 Ratios = 9:3::3:1
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
Probability What is the chance that a given event will occur? what is the chance that a child, or a family of children, will have a given phenotype? Probability - expressed in numbers between 0 and 1. Probability = 0 means the event never happens probability = 1 means it always happens. The total probability of all possible event always sums to 1.
Image of page 6
Chance deviation from an expected outcome is diminished by larger sample size .
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
The Multiplication and Addition Rules The multiplication rule probability that two or more independent events will occur together is the product of their individual probabilities. The addition rule States that the probability that any one of two or more exclusive events will occur is calculated by adding together their individual probabilities
Image of page 8
The Multiplication Rule States that the probability that two or more independent events will occur together is the product of their individual probabilities.
Image of page 9

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

View Full Document Right Arrow Icon
Laws of probability Help Explain Genetic Events Genetic rations are most properly expressed as probabilities - 3/4 tall:1/4 dwarf. These values predict the out come of self fertilization of F1 for one pair of contrasting alleles. × Rr Segregation of alleles into eggs Rr Segregation of alleles into sperm R r r R R R R 1 2 1 2 1 2 1 4 1 4 1 4 1 4 1 2 r r R r r Sperm × Eggs
Image of page 10
The rule of addition States that the probability that any one of two or more exclusive events will occur is calculated by adding together their individual probabilities
Image of page 11

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

View Full Document Right Arrow Icon
Conditional Probability When one event depends on another, the likelihood of the desired outcome is the conditional probability. Example: In a monohybrid cross DD X dd. What is the probability that a tall plant is heterozygous? Pc = Pa/Pb Pa : p of heterozygous Pb: p of a plant being tall Pc= (1/2)/(3/4)=2/3
Image of page 12
In a family of four children, what is the probability of having 2 boys and 2 girls?
Image of page 13

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

View Full Document Right Arrow Icon
Image of page 14
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