Monday, February 24, 2014Complete the

handout: Modeling Mitosis and Meiosis. • You can use

your notes!Reminder: MOY II

Wednesday!

Predict the baby’s traits

Here are your parents traits:

Mom: Dad:Dimples=dd No dimples=DDFreckles=FF Freckles=FF

Predict their offspring’s traits by giving a percentage that the baby will have dimples and freckles

Gregor Mendel 1822-1884• Father of modern

genetics• Used pea plants

to demonstrate that certain traits were inherited and followed patterns

Characteristics of the pea plants Mendel studied:• Seed Shape• Seed Color• Tall vs. Short

Plants• Flower Color

Mendel’s Accomplishments:• Used Punnett squares to predict

probability of a trait being expressed• Gene vs. Allele• Heterozygous and Homozygous

alleles• Genotype and Phenotype

Mendel’s Accomplishments:

Alleles can be…Dominant Traits Recessive Traits

Mendel’s Accomplishments:

Incomplete Dominance Codominance

Incomplete Dominance

● Incomplete dominance: heterozygotes have a unique phenotype that is often ‘in between’ the parental types

• Genotypes of the parentsB R = patchwork fishB B = blue fish (Dad)R R = red fish (Mom)

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)

Co-Dominance Mom Dad