1. Title: Biology 2/5/07 Objectives: Class Topics
6/22/2019
Title: Biology 2/5/07
Objectives:
To continue learning about Mendelian genetics and learn about some of the aberrations to Mendelian genetics
Class Topics
Hand in Genetics Problems Worksheet before the bell rings please
Review Chapter 8 Quiz 1
Chapter 8 – Beyond Mendel
Review Dihybrid crosses
Chapter 8 Quiz 2 Preview
Probability
Test Crosses
Pedigree
“The man who does not read good books has no advantage over the man who cannot read them.”
Mark Twain
Saturday, June 22, :07 PM

2. Class Assignments Genetics Problems 2/5/07 Read 170-178 2/5/07
6/22/2019
Class Assignments
What
By When
Genetics Problems 2/5/07
Read /5/07
Chapter 8 Quiz 2 2/7/07
W.S. Probability and dihybrid crosses 2/7/07
Due this class period
Due next class period
Due in the future

3. 6/22/2019
Grade Sheet
2A – p. 157 (5 pts.)

4. 6/22/2019
Dihybrid Cross
GgTt x GgTt

5. 6/22/2019
Results
F1 - Pheno
Green/Tall
Green/short
yellow/Tall
yellow/short
What if there were 961 of these seeds planted? Approximately, how many of each type would there be?

6. Probability Likelihood that an event will occur
6/22/2019
Probability
Likelihood that an event will occur
Expressed as a fraction, ratio, decimal, or percentage (we’ll use fractions)
Probability of a coin landing as “heads”?
1:1, ½, 0.50, 50%
Probability a heterozygote will produce a dominant allele in its gamete?

7. Probability Product rule Toss a coin – probability of “tails”?
6/22/2019
Probability
Product rule
Toss a coin – probability of “tails”?
Toss the same coin again – probability of “tails”?
Probability of 2 “tails”
½ x ½ = ¼

8. Probability Male Female
6/22/2019
Probability
Male
1/2
Female
Family with having a boy, a girl, a boy, and a girl in that order.

9. Test Cross Used when there’s an unknown genotype of dominant phenotype
6/22/2019
Test Cross
Used when there’s an unknown genotype of dominant phenotype
Crossed with a homozygous recessive
Recessive phenotype
If offspring are all dominant?
If offspring are ½ dominant and ½ recessive

10. 6/22/2019
Test Cross problem
Determine the genotype of a pea plant with yellow seeds if the test cross offspring all have yellow seeds
P ___ x ___ F1
Pheno
Geno
What if the F1 had ½ yellow and ½ green seeds?

11. Chapter 8 Quiz 2 Review Codominance cross Incomplete dominance cross
6/22/2019
Chapter 8 Quiz 2 Review
Codominance cross
F1 and F2 generations
Incomplete dominance cross
F1 only
Mendel’s numbers – ratios – pod color
Dihybrid cross 1
F1 and extrapolate data for more seeds
Dihybrid cross 2
F1 and F2 generations and extrapolate data for more seeds

12. Pedigree Analysis Hemophilia
6/22/2019
Males = Square
Females = Circles
Each generation is a line
Vertical lines connect parents and children
Indirect horizontal lines connect siblings
Left to right in order with age.
Pedigree Analysis Hemophilia

13. Pedigree Analysis Seen in every generation Skips generations 6/22/2019
From: