chapter 3 heredity Flashcards
The passing of genetic traits from parent to offspring.
Heredity
The trait observed in the first generation.
Dominant Trait
A trait that reappears in the first second generation.
Recessive Trait
One set of instructions for an inherited trait.
Genes
One of the alternative forms of a gene.
Allele
An organism’s appearence or other detectable characteristic.
Phenotype
The entire genetic makeup of an organism.
Genotype
Chromosomes that have the same sequence of genes and the same structure.
Homologous Chromosomes
A process in a cell division during which the number of chromosomes decrease to half the original number.
Meiosis
One of the pair of chromosomes that determine the sex of an indivdual.
Sex chromosmes
A diagram that shows the occurrence of a genetic trait in seval generations of a family.
Pedigree