1. Create an argument for whether sexual or asexual reproduction is better.

2. What do you observe about the families below?

3. What question would your observation lead you to test?

4. Scientific Method Observe Ask a Question Research Hypothesis
Experiment
Analyze Your Data and Draw a Conclusion
Communicate Your Results

5. Mendel Father of Genetics
Garden pea
Noticed that traits were passed from generation to generation
Inheritance or heredity

6. Mendel studied different traits.
Chapter 10
Sexual Reproduction and Genetics
Mendel studied different traits.
Seed or pea color
Flower color
Seed pod color
Seed shape or texture
Seed pod shape
Stem length
Flower position

7. Chapter 10
Sexual Reproduction and Genetics

8. Alternative forms of a single gene
Chapter 10
Sexual Reproduction and Genetics
10.2 Mendelian Genetics
Genes in Pairs
Allele
Alternative forms of a single gene
Dominant
Recessive

9. Dominant YY= yellow Yy= yellow Recessive yy= yellow
Homozygous - Two of the same alleles YY or yy
Heterozygous - Different Alleles Yy
Hybrid
Dominant YY= yellow Yy= yellow
Recessive yy= yellow

10. Genotype- genetic makeup (allele pairs)
YY,Yy, yy
Phenotype - observable characteristics (physical appearance)
yellow, green

11. What is a law?

12. A law…. Explains a set of observations Does not tell why
A phenomenon of nature that has been proven to invariably occur whenever certain conditions exist or are met

13. Mendel’s Law of Segregation
Sexual Reproduction and Genetics
Mendel’s Law of Segregation
Two alleles for each trait separate during meiosis.
Leads to new combination......Variation

14. Law of independent assortment
Alleles are randomly distributed during meiosis

15. Monohybrid cross
Inheritance of a single trait

16. Dihybrids are heterozygous Carry the allele for both traits.
Sexual Reproduction and Genetics
Dihybrid Cross
The simultaneous inheritance of two or more traits in the same plant is a dihybrid cross.
Dihybrids are heterozygous
Carry the allele for both traits.

17. Predict the possible offspring of a cross between two known genotypes
Sexual Reproduction and Genetics
Punnett Squares
Predict the possible offspring of a cross between two known genotypes
Monohybrid Cross

18. Punnett Square—Dihybrid Cross
Chapter 10
Sexual Reproduction and Genetics
Punnett Square—Dihybrid Cross
Four types of alleles from the male gametes and four types of alleles from the female gametes can be produced.
The resulting phenotypic ratio is 9:3:3:1.

19.   Probability
Likelihood that
something will occur
1/2
1/2*1/2= 1/4

20. Quiz
Explain the role of meiosis in reproductive variability using Mendel’s laws