Genetics

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Punnet Square I
Punnet Square II
Making Babies
Traits Lab
Mapping Traits
Vocabulary
Protein Synthesis

Genetic SLC
DNA Replication

Genetics Facts

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Heredity
DNA Structure
Protein Syntheses & Bioengineering

Genetics Sites

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Genetics


Vocabulary 2

(Vocabulary definitions developed by Biology Staff, Thurgood Marshall Academic High School, 1999-2001)

Homozygous Dominant: A GENOTYPE resulting from two dominant alleles, where both alleles code for the same trait.

Example 1: RR for pea shape
Example 2: TT for pea height

Homozygous Recessive: A GENOTYPE resulting from two recessive alleles, where both alleles code for the same trait.

Example 1: rr for pea shape
Example 2: tt for pea height

Heterozygous: A GENOTYPE resulting from two different alleles.

Example 1: Rr for pea shape
Example 2: Tt for pea height

Phenotype: The PHYSICAL RESULT of a GENOTYPE.

Example 1: RR results in round peas.
Example 2: Rr results in round peas.
Example 3: rr results in wrinkled peas.

Meiosis: Cell division that results in producing GAMETES. At the end of meiosis, the gametes have half the original number of chromosomes. The chromosomes are no longer in pairs.

Gametes: The result of meiosis, for example the production of eggs.

Example 1: Eggs.
Example 2: Sperm.
Example 3: Pollen.
Example 3: Ovules.