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Chapter 8; part one
genetics
12
Biology
9th Grade
11/04/2010

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Term
heredity
Definition
passing of genetic traits from parent to offspring
Term
genetics
Definition
the study of heredity
Term
monohybrid cross
Definition
cross between individuals that has one pair of CONTRASTING TRAITS!
Term
true breeding
Definition
genotypes homozygous for a specific trait that always produces offspring with the same phenotype.
Term
P generation
Definition
parent generation; first two individuals that mate in a genetic cross
Term
F1 generation
Definition
the first generation of offspring obtained in a cross
Term
F2 generation
Definition
the second generation of offspring in a cross; products of the F1 generation.
Term
allele
Definition
alternative form of a gene that controls characteristics such as hair and eye color.
Term
dominant
Definition
characteristic that is physicaly seen; the uppercase number; ex: Rr, RR
Term
recessive
Definition
characteristic not physicaly seen; lowercase letter; ex: Rr, rr
Term
homozygous
Definition
identical alleles; homologous chromosomes; ex: RR, rr
Term
heterozygous
Definition
different alleles; ex: Rr, Tt, Ww
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