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20 Cards in this Set

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Chromosome

A tightly coiled strand of DNA. They come in pairs called homologous chromosomes

Trait

Characteristics or features we inherit from parents

Gene

A gene is a specific length (sequence of bases) of DNA that determines a patocular characteristic

Allele

The variation of the gene containing different Base sequences

Mutation

A permanent change in the Base sequence

Genotype

The combination of alleles for a paticualrt trait

Phenotype

Physical expression of a trait

Gamete

Sex cell

Zygote

Cell formed by the fusion of the sperm cell and egg cell

Dominant allele

An allele with the ability to mask a recessive allele

Recessive allele

An allele only expressed in the phenotype when both alleles in the genotype are recessive

Homozygous

Both alleles in the genotype are the same

Heterozygous

Allele present are different

Pure breeding

A person that is homozygous dominant or recessive

Sexual reproduction

A type of reproduction that includes two parent gametes. Offspring are unique

Asexual reproduction

A type of reproduction that requires one parent

Variation

The slight difference in individuals

DNA replication

When an identical copy is madeb

Mitosis

A type of cell division for growth and repair

Meiosis

A type of cell division for creation of gametes