Inheritance Unit

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20 terms

Genetic

Relating to genes or DNA

Trait

A characteristic

Inheritance

Something passed down genetically from parent to offspring

Heritable Trait

A characteristic that can be passed down genetically.

Meiosis

A process of cell division that produces haploid gametes

Gamete

A haploid sex cell like a sperm cell or egg cell

Diploid

Two complete sets of chromosomes

Haploid

One complete set of chromosomes

Zygote

A diploid cell formed when two haploid gametes unite

Fertilization

When gametes unite to form a zygote

Crossing Over

Exchange of genetic material between two chromosomes in one cell during meiosis

Allele

One letter in a genotype

Independent assortment

Parents each give offspring one of two alleles for a trait

Genotype

The alleles or letters for a trait. Could be heterozygous, homozygous dominant, or homozygous recessive.

Phenotype

The physical result of a trait. Ex. brown eyes, tongue roller, widow's peak.

Dominant

Capital letter. Will show always show that phenotype with one or two letters. Ex. Rr or RR

Recessive

Lowercase letter. It takes two of these to show that phenotype. Ex. rr

Heterozygous

Genotype with one dominant and one recessive allelle. Ex. Rr

Homozygous

Genotype with two dominant or two recessive alleles. Ex. RR or rr

Punnet Square

Used to show a cross between two parents and predict their offspring's traits.

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