probability and multiple trait inheritance
Download
Skip this Video
Download Presentation
Probability and Multiple Trait Inheritance

Loading in 2 Seconds...

play fullscreen
1 / 8

Probability and Multiple Trait Inheritance - PowerPoint PPT Presentation


  • 92 Views
  • Uploaded on

Probability and Multiple Trait Inheritance. Punnett Squares and Probability. All ratios established from a Punnett square, represent probabilities. Probability can be thought of as a score out of 1 that indicates the likelihood of an event. 0.50 event will occur half of the time

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about 'Probability and Multiple Trait Inheritance' - solana


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
punnett squares and probability
Punnett Squares and Probability
  • All ratios established from a Punnett square, represent probabilities.
  • Probability can be thought of as a score out of 1 that indicates the likelihood of an event.
    • 0.50 event will occur half of the time
    • 1.00 event will occur all of the time
  • Product Law: The probability of two or more outcomes occurring is equal to the product of their individual probabilities.
monohybrid crosses
Monohybrid Crosses
  • Thalassemia is an autosomal recessive condition that affects hemoglobin production and can cause anemia in affected persons

H = normal hemoglobin h = thalassemia

  • Consider two parents, both heterozygous for thalassemia:

Hh X Hh, what is the probability that they will have an affected child?

practice
Practice
  • What is the probability of a couple having 3 female children?
  • If a couple has 2 children, what is the probability they will have a boy and a girl?
  • If their first child is a girl, what is the probability that the next two will be girls?
probability and pedigrees
Probability and Pedigrees
  • The pedigree traces the occurrence of deafness throughout a family.
  • If individual IV-2 marries a deaf woman, what is the probability that any of their children will be deaf?
slide6
When analyzing risk based on a pedigree, correctly determining the mode of inheritance is key to making an accurate prediction.
  • Determine the mode of inheritance in each case:
dihybrid crosses
Dihybrid Crosses
  • In cocker spaniels:
    • black coat colour (B) is dominant to red (b)
    • solid colour (S) is dominant to white spotting (s).
  • If two dogs, heterozygous for both traits are mated, what is the probability they will have red offspring with white spotting?
warm up
Warm up
  • In mice, black coat (B) is dominant to white coat (b) and black eyes (E) are dominant to pink eyes (e).
  • A male, heterozygous for both traits, is mated to a pure-breeding recessive female.
    • Show the genotypes for each parent
    • Show the possible sex cells each parent could produce
    • Construct a Punnett square to determine all possible genotypes and phenotypes in the F1 generation.
ad