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BIOL 121P

Topic 6 - Inheritance

QuestionAnswer
Heredity the transmission of traits from parents to their offspring
Trait (Phenotype) any characteristic of an individual
Genes heritable units
Blended Inheritance traits from parents that combine
Hybridization Studies experiments that breed organisms with different traits to study how those traits are inherited by their offspring
Monohybrid Cross a genetic cross that looks at the inheritance of one single trait
Dominant an allele that only needs one copy to show its trait (Ex: BB, Bb) (if present, the trait will appear)
Recessive an allele that needs two copies (ex: bb)(if a dominant allele is present, the recessive trait is hidden)
Alleles variant forms of the gene for the trait (2 per gene)
Haploid Gametes offspring obtain 1 allele from each parent
Homozygous individuals with two copies of the same allele (RR or rr) (recessive = nondominant bb) (dominant = dominant BB)
Heterozygous individuals with two different alleles
Punnett Square used to predict the percentage of offspring expressing a particular trait
Dihybrid Cross tracks 2 different traits
Independent Assortment alleles of different genes are transmitted independently of each other
Dependent Assortment the transmission of one allele depends on the transmission of another
Codominance neither allele is dominant nor recessive to the other
Pedigrees shows phenotype segregation in several generation of related individuals
Mode of Transportation autosomal or sex linked; dominant or recessive
Sex-Linked Traits a trait that appears more frequently in one sex than the other (typically males)
Created by: user-1992551
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