Understanding Genetics: Mendel's Experiments and Inheritance Patterns

Delve into the world of genetics through Mendel's groundbreaking experiments with pea plants, exploring traits inheritance, Punnett squares, dominant and recessive alleles, incomplete dominance, and co-dominance. Gain insights into how traits are passed from parents to offspring and predict offspring traits based on parental genotypes.

• Genetics
• Mendel
• Traits Inheritance
• Punnett Squares
• Dominant Alleles

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1. Monday, February 24, 2014 Monday, February 24, 2014 Complete the handout: Modeling Mitosis and Meiosis. You can use your notes! Reminder: MOY II Wednesday!

2. Predict the babys traits Predict the baby s traits Here are your parents traits: Mom: Dimples=dd No dimples=DD Freckles=FF Freckles=FF Dad: Predict their offspring s traits by giving a percentage that the baby will have dimples and freckles

3. Gregor Gregor Mendel 1822 Mendel 1822- -1884 1884 Father of modern genetics Used pea plants to demonstrate that certain traits were inherited and followed patterns

4. Characteristics of the pea Characteristics of the pea plants Mendel studied: plants Mendel studied: Seed Shape Seed Color Tall vs. Short Plants Flower Color

5. Mendels Accomplishments: Mendel s Accomplishments: Used Punnett squares to predict probability of a trait being expressed Gene vs. Allele Heterozygous and Homozygous alleles Genotype and Phenotype

6. Mendels Accomplishments: Mendel s Accomplishments: Alleles can be Alleles can be Dominant Traits Recessive Traits

7. Mendels Accomplishments: Mendel s Accomplishments: Incomplete Dominance Codominance

8. Incomplete Incomplete Dominance Dominance Incomplete dominance: heterozygotes have a unique phenotype that is often in between the parental types

9. Co Co- -Dominance Dominance In a certain fish, blue scales and red scales are codominant. What happens if you breed this fish with a fish that only has Blue Scales. What s the percentage the baby will have patches? (use a Punnett square) Mom Dad Genotypes of the parents B R = patchwork fish B B = blue fish (Dad) R R = red fish (Mom)