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19 Cards in this Set

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Recessive (trait)
The form of a trait that appears least often in offspring.

Usually represented by a lower case letter
Polygenic inheritance
When a group of genes pairs act together to produce a single trait.

Eye and Hair color
Incomplete Dominance
When both alleles are expressed in offspring.
A blending of traits.
Sex-linked gene (trait)
Alleles inherited on a sex chromosome.
Pedigree
A tool used for tracing the occurance of a trait in a family.

Males represented by squares
Females represented by circles
Genetic engineering
The science of altering the genetic makeup of an organisms by deleting, adding or correcting genes.

AKA: Genetically Modified Organism
Probability
THe mathematical chance that an event will occur
Genome
The "map" showing the location of individual genes on each chromosome.
Multiple alleles
A trait that has more than two alleles.

Blood type
A,B,O
Punnett Square
a tool used to predict results (alleles) of crosses of two parents
Trait
Any characteristic or condition resulting from the genetic make up of an organism
Heredity
The passing on of traits from parent to offspring.
Alleles
The different forms a gene may have for a trait.

Genetics
The study of how alleles (traits) affect generations of offspring.
Genotype
Letters that show the genetic make up of an organism
Homozygous
An organism with two alleles for a trait that are exactly the same.

RR or rr
Dominant (trait)
The form of a trait that appears to mask another form of the same trait.

Usually represented by an upper case letter.
Phenotype
The physical trait that shows as a result of a particular genotype.
Heterozygous
An organism that has two different alleles for a trait.

Rr