12.2

What did Mendel observe?

He observed heredity. (the passing of the physical characteristics, or traits, from parents to offspring)
Today, Mendel's discoveries form the foundation of ________, the scientifc study of heredity.

genetics
A new organism begins to form when egg and sperm cells join in the process called __________.

fertilization
What is a purebred?

when a purebred organism is the offspring of many generations that show the same form of a trait.
What is an example of a purebred organism?

Two purebred tall pea plants always producing tall offspring.
Today, scientists know that _____ control the inheritance of traits.

genes
What do scientists call the purebred tall plants crossed with the purebred short plants?

parental, or P generation
______ are the different forms of a gene.

Alleles
What is an organsism's traits controlled by?

Alleles it inherits from it's parents
Some alleles are _____, while other alleles are ______.

dominant, recessive
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12.2

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FLahscards for science lesson 12.2

Updated

2013-03-12T13:39:35Z

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