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Test 2
Gregor Model & Alleles & Incomplete/Co-Dominance
40
Biology
9th Grade
07/08/2014

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Term
true-breeding
Definition
produces offspring identical to themselves
Term
manipulated
Definition
Mendel physically pollinated plants w/known traits. Also known as cross-polination
Term
traits
Definition
specific characteristics that vary from one individual to the next
Term
do hybrids blend traits?
Definition
never
Term
allele
Definition
different forms of a gene
Term
dominant allele
Definition
organism with this allele will always be found in that form (uses a capital letter)
Term
do alleles always come in pairs?
Definition
yes
Term
recessive allele
Definition
will be found in the absence of a dominant allele (uses a lowercase letter)
Term
probability
Definition
likelihood that a chance event will occur
Term
homozygous
Definition
two identical alleles (AA or aa)
Term
heterozygous
Definition
two different alleles (Aa)
Term
genotype
Definition
genetic makeup of an organism
Term
phenotype
Definition
physical characteristics
Term
P (parental)
Definition
original set of parents
Term
F1 (first fial)
Definition
P's offspring
Term
F2 (second fial)
Definition
F1's offspring
Term
hybrid
Definition
offspring of crosses between parents with different traits
Term
are genes passed through generations?
Definition
yes
Term
do genes determine traits?
Definition
yes
Term
do different combinations of genes produce different traits?
Definition
yes
Term
the law of dominance
Definition
genes possessing dominant allele will show dominant trait and genes possessing recessive (w/o dominant present) will show recessive
Term
genotypic ratio
Definition
ratio of possible genetic combinations
Term
phenotypic ratio
Definition
ratio of possible physical combinations
Term
a recessive trait will come through if...?
Definition
the organism's genotype is homozygous recessive
Term
a dominant trait will come through if...?
Definition
the organism's genotype is homozygous dominant or heterozygous
Term
incomplete dominance
Definition
no allele is completely dominant (they blend)
Term
co-dominance
Definition
both alleles contribute to the phenotype
Term
A & B blood types...?
Definition
codominate
Term
Type A will dominate...?
Definition
Type O
Term
Type B will dominate...?
Definition
Type O
Term
Type A is...?
Definition
AA or AO
Term
Type B is...?
Definition
BB or BO
Term
Type AB is...?
Definition
AB
Term
Type O is...?
Definition
OO
Term
antigens
Definition
determine blood types
Term
how many antigens does blood type O have?
Definition
none
Term
What type of blood is the "universal acceptor"?
Definition
Type AB
Term
What type of blood is the "universal donor"?
Definition
Type O
Term
Blood types A & B only accept what types of blood?
Definition
Their own type and Type O
Term
antigens determine...?
Definition
blood types
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