Genetic Selection in Poultry

Flashcards covering key vocabulary and concepts from the lecture on genetic selection in poultry.

Mendelian Inheritance

Inheritance of a single gene with two alleles, involving dominant and recessive alleles.

Phenotype

Observed characteristic that is expressed and can be measured.

Genotype

The DNA variants responsible for the expression of the phenotype; the genetic constitution of an individual organism.

Co-dominance

Occurs when both parental phenotypes are expressed in the offspring.

Incomplete dominance

Occurs when a dominant allele does not completely mask the effects of a recessive allele, resulting in a blending of both phenotypes.

Heritability (h2)

The proportion of variability within a population attributed to inherited genetic factors.

Single Trait Selection

A method of selection that results in rapid progress but is least adapted to environmental conditions.

Multiple Trait Selection

A method that considers more traits, resulting in slower progress but better accommodation for sub-optimal environmental conditions.

Progeny Testing

A method that evaluates the genetic potential of parents based on the performance of their offspring.

Broiler Breeder Paradox

The phenomenon where genetics for growth leads to poorer reproductive performance due to energy allocation.

Crossbreeding

A method used to increase genetic diversity by combining different pure breed lines.

Health and Behavior Problems

Issues that arise when layers are placed in environments unsuitable for their upbringing, leading to aggression and other negative traits.