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Essential Vocabulary
Test crosses help to determine the genetics when the alleles are unknown. By crossing with a known recessive true-breed, the offspring will show what the genetics of the unknown subject.
Pea plants are used in classic genetics experiments. Here is a cross between two pure breed plants but one is dominant and the other is recessive.
Here is a cross between two hybrid plants. You get the classic 3:1 phenotype ratio.
Complete dominance genetic cross of two pure-breed or true-breeding parents (P1).
Common traits in pea plants.
Sex Determination Beyond X and Y
(Intersex and transsexual spectrum)
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