Ch5: Heredity Flashcards
Dominant trait
The trait observed in the first generation when parents that have different traits are bred.
Recessive trait
A trait that reappears in the second generation after disappearing in the first generation when parents with different traits are bred.
Gene
One set of instructions for an inherited trait.
Allele
One of the alternative forms of a gene that governs a characteristic, such as hair color.
Phenotype
An organisms appearance or other detectable characteristic.
Genotype
The entire genetic makeup of an organism the combination of genes for one or more specific traits.
Probability
The likelihood that a possible future event will occur in any given instance of the event.
Meiosis
A type of cell division that results in four daughter cells each with half the number of chromosomes of the parent cell, as in the production of gametes and plant spores.
Homologous chromosomes
Chromosome that have the same sequence of genes and the same structure.
Sex chromosome
One of the pair of chromosomes that determine the sex of an individual.
Pedigree
A diagram that shows the occurrence of a genetic trait in several generations of a family.
Heredity
The passing of genetic traits from parent to offspring.
