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Name: __________________________
Notes – Genetics I
Date: __________/Page#: ____
Mr. Jensen/Period: ____
Genetics I note sheet
What is Genetics?
___________________________________________________________________________
_____________________________________________________
The Father of Genetics
•
_____________________________ an Austrian monk, studied the variety of traits
(different characteristics) in pea plants
•
His experiments are now considered to be the beginning of the science of genetics!
Here is what Mendel did:
•
He took the __________________ (male sex cells) from one pea plant and transferred
it to the ________________ (female part) of another pea plant
•
This is called _____________________________________.
Mendel found that:
•
He was able to cross pea plants with _________________________ traits
•
After the 1st cross, the F1 generation would show certain traits while some traits
seemed to be ___________________________
•
After the 2nd cross, certain traits would ____________________ in the F2 generation
An example of one of Mendel’s crosses. White flowers are dominant to pink flowers.
P generation
X
F1 generation
Cross F1 generation
F2 generation
More traits in pea plants that Mendel studied.
X
Based on his findings, Mendel stated:
1. The law of segregation – when the
parent forms sex cells, the parent gene
pairs separate, one gene from each pair
goes to each sex cell
Parent genotype:
Sex cells:
A
Aa
a
2. The law of independent assortment – each gene pair for a
trait is inherited independently of the gene pairs for all other traits