Genetics ig
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Gene
A section on a chromosome that has genetic information for one trait.
Allele
A different form of the gene.
Phenotype
Geneticists call how a trait appears, or is expressed, the phenotype of the trait.
Genotype
The two alleles that control the phenotype of a trait are called the traits genotype.
Homozygous
When the two alleles of a gene are the same, its genotype is homozygous.
Heterozygous
If the two alleles of a gene are different.
Punnett Square
A model used to predict possible genotypes and phenotypes of offspring.
Pedigree
A diagram is a diagram that shows phenotypes of genetically related family members that gives clues about genotypes.
Dominate Trait
A genetic factor that blocks another genetic factor
Recessive trait
A genetic factor that is blocked by the presence of a dominant factor