A cell with half the normal number of chromosomes (n instead of 2n) is called a ____________ cell.

___________ is a type of cell division that reduces the number of chromosomes (is called a reduction division).

____________ is a process during which chromosomal segments are exchanged between a pair of homologous chromosomes

__________ is the science of heredity.

A(n) _________ is an alternative form of a gene passed from generation to generation.

An organism with two different alleles for a trait is ________________. (example Aa)

An organism with two of the same alleles for a trait is ________________ (example: AA).

An organism's gene pairs are its _________________ (example: Aa)

The observable characteristics and outward expression of a gene is known as an organism's _________________ (example: Aa means they have brown hair).

Mendel's ___________________ states that the two alleles for each trait separate during meiosis.

Heterozygous organisms are called ________________.

The combination of genes produced by crossing over and independent assortment is called __________________.

___________ is the occurence of one or more extra sets in all chromosomes of an organism.