Vocab
The basic unit of heredity passed from parents to offspring.
Gene
The type of plant Mendel used for his experiments.
Pea Plants
A trait that always shows up in the organism when the allele is present.
Dominant trait
The letters on the outside of a Punnett square represent these.
Parent alleles
When neither allele is dominant and the offspring shows a blend.
Incomplete dominance
Different forms of a gene.
Allele
Mendel discovered that traits are controlled by these “factors,” now called this modern term.
Genes
A trait that is hidden when a dominant allele is present.
Recessive trait
The letters inside a Punnett square represent these.
Possible genotypes of offspring
When both alleles are dominant and are shown equally (like roan cattle).
Codominance
An organism’s physical appearance or visible traits.
Phenotype
Give me the percentage of genotypes with Two Heterozygous parents
Use letter D
DD = 25%
Dd = 50%
dd = 25%
The allele combination: one dominant, one recessive.
Heterozygous
The cell structure that contains genes.
Chromosomes
A gene with more than two possible alleles.
Multiple alleles
The genetic makeup of an organism.
Genotype
Give me the percentage of genotypes with one Heterozygous parent and OneHomozygous Dominant Parent
Use R
RR = 50%
Rr = 50%
rr = 0%
he allele combination: both alleles are the same.
Homozygous
The molecule that carries genetic information.
DNA
An example of a human trait controlled by multiple alleles.
Blood - ABO
A tool used to predict the probability of genetic outcomes in offspring.
Punnet Square
If green eyes are dominant over blue eyes.
What is the chance of having blue eyed children from parents who both have blue eyes?
100%
The term for an organism showing the dominant phenotype but carrying both alleles.
Heterozygous (hybrid)
A segment of DNA on a chromosome that codes for a trait.
Gene
Traits controlled by two or more genes, such as height or skin color.
Polygenic Inheritance