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Unit 5 Packet

Ap Bio

TermDefinition
Allele A version of a gene. Each individual has two alleles for each gene, one from each parent.
Genotype The genetic makeup of an organism (e.g., AA, Aa, aa).
Phenotype The observable traits of an organism (e.g., purple flowers, white flowers).
Homozygous Having two identical alleles for a gene (e.g., AA or aa).
Heterozygous Having two different alleles for a gene (e.g., Aa).
Dominant An allele that is expressed even if only one copy is present (represented by a capital letter, e.g., A).
Recessive An allele that is only expressed if two copies are present (represented by a lowercase letter, e.g., a).
Monohybrid Cross A cross that examines the inheritance of one trait.
Dihybrid Cross A cross that examines the inheritance of two traits at once.
Test Cross A cross with a homozygous recessive individual to determine the unknown genotype of another individual.
Created by: efffa
 

 



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