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Genetics
important terms to remember
12
Science
10th Grade
04/19/2007

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Term
Trait
Definition
A characteristic that can be passed from parents to offspring

ex: eye color, nose shape or hair color
Term
Aristotle
Definition
who believed that blood carried the genetic material ""he believed that a persons physical feature and personality produced a substance he named pangenes, which soaked into the blood""[image]
Term
Pangene hypothesis....we get our word "gene"
Definition
pangenes are produced by the features and personality...then they go to reproductive organs..and this blood of males and females mix with the blood of the baby....now the baby has inherited the pangenes from the mother and the father.
Term
Genetics
Definition
Study of hereditary and the passing of traits from one generation to the next.
Term
Gregor Mendal
Definition
First to observe how traits were passed from one generation to the next by looking at the pea plants.

!!!"father of genetics!!!£"£"
Term
Hybrid
Definition
An organism that has different genetic information for a trait from each parent.
Term
Purebred
Definition
An organism that has the same genetic information for a trit from each parent.
Term
Blending hypothesis
Definition
when short plants are crossed with tall pea plants many scientists belived that there offsprings would be medium height pea plants (they were wrong) because they produced tall pea plants.
Term
Dominant trait
Definition
A trait that is SEEN in the offspring

(it is expressed in capital letters)
Term
Recessive trait
Definition
A trait that is not seen in the offspring.

(it is expressed in a lower case letter)
Term
Gene
Definition
Segment of DNA that codes for protein
Term
Alleles
Definition
Different versions of trait...such as dominant and recessive.
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