1-3-Pedigrees

This set of flashcards covers key vocabulary and concepts related to genetic inheritance patterns and the analysis of pedigrees, tailored for exam preparation.

Pedigree

A diagram that shows the familial relationships and inheritance patterns of traits across generations.

Penetrance

The proportion of individuals with a specific genotype that express the related phenotype.

Expressivity

The degree to which a genotype is expressed in the phenotype among individuals.

Codominance

A genetic scenario where neither allele can mask the expression of the other, resulting in both being expressed.

Incomplete dominance

A genetic scenario where the dominant allele does not completely mask the effects of the recessive allele, leading to a blended phenotype.

Imprinting

A genetic phenomenon where the expression of an allele is influenced by the sex of the parent that contributed it.

Mitochondrial inheritance

A form of inheritance exclusively inherited from the mother, concerning mitochondrial DNA.

X-linked traits

Traits that are determined by genes located on the X chromosome, influencing inheritance patterns predominantly in males.

Autosomal dominant traits

Traits that are expressed in every generation, where affected individuals can have unaffected offspring.

Autosomal recessive traits

Traits that may skip generations and require both parents to pass on the recessive allele for the trait to be expressed.