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What did Mendel observe?
He observed heredity. (the passing of the physical characteristics, or traits, from parents to offspring)
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Today, Mendel's discoveries form the foundation of ________, the scientifc study of heredity.
genetics
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A new organism begins to form when egg and sperm cells join in the process called __________.
fertilization
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What is a purebred?
when a purebred organism is the offspring of many generations that show the same form of a trait.
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What is an example of a purebred organism?
Two purebred tall pea plants always producing tall offspring.
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Today, scientists know that _____ control the inheritance of traits.
genes
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What do scientists call the purebred tall plants crossed with the purebred short plants?
parental, or P generation
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______ are the different forms of a gene.
Alleles
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What is an organsism's traits controlled by?
Alleles it inherits from it's parents
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Some alleles are _____, while other alleles are ______.
dominant, recessive
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One Direction
An awesome british/irish boy band
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