This is an example of the Cornell Notes that students will write while reading assigned chapters.
In the top right corner, the student writes his/her first and last name.
On the next "invisible" line the student writes the current date.
The third line is p. # which is the period she/he has for science.
The fourth line is the assignment number which will be written in the homework planner/agenda.

Name
Date
p.
21

The heading of the Cornell is three parts: the chapter number and section, the title of the section, and the pages of the section. This information is found in the textbook.

Chapter 6.2 Genetics Since Mendel
p 160-162

Multiple Alleles
Differentiate the difference between a two allele trait and a multiple allele trait and give an example.

Polygenic
Inheritance

Notes for each heading/subheading are written as short facts. They are not complete sentences. Students select what facts are important. Using abreviations and symbols is extremely helpful and time-saving

many traits are controlled by more than two alleles (2 forms or types of traits)
multiple alleles- a trait controlled by more than 2 alleles
blood type in humans is controlled by multiple alleles- 3
A & B are both dominant= AB
O is recessive = AO, BO
Type O= only if each parent gave an O

eye color is a single trait produced by a combination of many genes
poly= many genic= genes
polygenic inheritance- occurs when a group of gene pairs acts together
to produce a single trait
there are many different shades of blue or brown eyes
skin color controlled by 3 to 6 different genes
many nonhuman traits are affected by polygenic inheritance

Section Assessment

GATE Only


GATE Only

Sometimes students will be assigned to answer questions at the end of the section. Students will check their planner for the specific homework assignment.

1. Multiple Alleles involve a single pair of genes that have more than two alleles.
Polygenic inheritance involves many pairs of genes each with two or more alleles, that all affect the same trait.
2. A trait inherited by incomplete dominance is not a blend of the two alleles. When an intermediate form (pink) are crossed, the offspring will be either red, pink, or white.
3. These are examples of different traits:
polygenic inheritance trait = fingerprints
multiple alleles = blood types
incomplete dominance = flower color in four-o’clock plants
4. The inherited trait for feather color is an example of incomplete dominance. Instead of producing black or white chickens the offspring will have gray feathers.