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13 Cards in this Set

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monohybrid cross
crossing an organism with only 1 trait that differs
hybrids
offspring of two different homozygous varieties
allele
a different version of a gene
homozygous
a pair of alleles are exactly the same
heterozygous
a pair of alleles are different
dominant allele
overpowers the other alleles; when present, it is most likely to be expressed
recessive allele
the allele that is considered the 'weaker' one; is less likely to be expressed
gamete
sex cell
Mendel's Principle of Segregation
1. normal cells have chromosomes in pairs
2. to form gametes (sex cells), the pairs of chromosomes are separated
3. this explains the Principle of Segregation
genotype
genetic makeup
phenotype
physical expression of the genes
testcross
to find out the genotype of a given organism, cross with a homozygous recessive partner
dihybrid cross
crossing organisms that differ in 2 characteristics