1. 2/25/2015
April 1st, 2015
Bio 1: Period 1,3, 4, 7
03/26/2015
ANNOUNCEMENTS: Prefix Test Tomorrow
Chap 6 Test Reflections  Afterschool by today at 330pm
All Missing assignments for Marking Period 3 due by tomorrow at 330p
Homework: Study Prefixes
A LOT OF MISSING ASSIGNMENTS!!!!
On your desk: HWP, Chap 7 ISN
Turn in: Late Sex-Linked Practice Packet & Labs
Warmup: Study 7.1
Agenda: 7.1Quiz, 7.2 Apply
EQ(s): How do complex patterns of inheritance defy Mendel’s rules?

2. Complex Patterns of Inheritance
Page 20
EQ: How do complex patterns of inheritance defy
Mendel’s rules?
Section 7.2
Complex Patterns of Inheritance

3. Phenotype can depend on interactions of alleles
Incomplete Dominance  a heterozygous phenotype is somewhere between the 2 homozygous phenotypes
Neither allele is dominant
The resulting phenotype is a “blend” of the original phenotypes.
third phenotype in which both of the parental traits are blended

4. Codominance
third phenotype in which both of the parental traits appear together
Codominance  when both alleles of a trait are expressed completely

5. Many genes may interact to produce one trait
Polygenic traits  traits produced by 2 or more genes
Examples:
eye color and skin color

6. Epistasis  an interaction of genes, in which the presence on one gene influences to appearance of the other

7. The environment interacts with genotype
EPIGENETICS!!!!
Remember?
Lick a Rat
Genes and the environment interact to determine certain traits
Example: the gender of sea turtles depends on genes and the environment
Turtle eggs that mature in warmer temperatures develop into female turtles
Turtle eggs that mature in cooler temperatures develop into male turtles

8. Apply on Page 19 Complete the Apply Problems on Page 19.
Incomplete Dominance
Codominance
03/26/2015

9. Example Problem Incomplete Dominance:
A plant with red flowers (RR) was mated with a plant that has white flowers (WW). Please draw a Punnett square showing incomplete dominance. Indicate the genotype and phenotype of the offspring.
Genotype:
RR =
RW =
WW =
Phenotype:
Red =
Pink =
White =
R R
Parents:
RR x WW W

10. Example Problem Genotype: Phenotype: Codominance:
A mother has type A blood (IAi) and the father has type O blood (ii). Please complete a Punnett square showing the genotypes and phenotypes of the offspring.
IA i
Genotype:
Phenotype: i
Parents:
IAi x ii

11. Exit Ticket
03/26/2015