Download Biology First Six Weeks Vocabulary

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Transcript
Genetics Vocabulary
TERM
DEFINITION
Phenotype
The physical expression of a gene
Genotype
The actual allele combination of a gene
Homozygous Dominant
A gene combination in which an individual possesses two dominant alleles
Homozygous Recessive
A gene combination in which an individual possesses two recessive alleles
Heterozygous
A gene combination in which an individual possesses one dominant and one recessive
allele
Monohybrid Cross
A genetic cross to examine the possible inheritance of one specific set of alleles
Dihybrid Cross
A genetic cross to examine the possible inheritance of two specific sets of alleles
Gregor Mendel
An Austrian monk and botanist who established key principles for the study of
genetics; the father of genetics
Punnett Square
A tool used to analyze the possible gene combinations of the offspring between two
Individuals
Incomplete Dominance
A heterozygous genotype that produces a blend of traits in the phenotype
Codominance
A heterozygous genotype where alleles are expressed equally, such as blood type
Multiple Alleles
Having more than two alleles are a gene, such as blood type
Sex-linked Traits
Genes that are located on the sex chromosomes; usually the X chromosome
Polygenic Traits
A inherited trait influenced by three or more genes
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