Genetics Open-Note Quiz

mitosis

cell division in which the nucleus divides into nuclei containing the same number of chromosomes

Meiosis

(genetics) cell division that produces reproductive cells in sexually reproducing organisms

DNA

A complex molecule containing the genetic information that makes up the chromosomes.

Genes

Chemical factors that determine traits

recessive

An allele that is masked when a dominant allele is present

dominant allele

An allele whose trait always shows up in the organism when the allele is present.

Hybrid

An organism that has two different alleles for a trait

Homozygous

An organism that has two identical alleles for a trait

Genotype

An organism's genetic makeup, or allele combinations.

phenotype

An organism's physical appearance, or visible traits.

traits

Characteristics that are inherited

Heredity

Passing of traits from parents to offspring

Genetics

The scientific study of heredity

heterozygous

having two different alleles for a trait

alleles

the letters that represent different forms of a gene