Beyond Mendelian Genetics Flashcards
When alleles are not completely dominant or recessive, what occurred?
Incomplete dominance
Co-dominance
Beyond Mendelian Genetics with a single gene
Incomplete Dominance
Co-dominance
Multiple alleles
Pleiotrophy
Multiple alleles is when..?
A gene has more than 2 alleles
Pleiotrophy is..?
When a gene produces multiple phenotypes
In incomplete dominance…
The phenotype of F1 hybrids is somewhere between the phenotypes of the two parental varieties
In codominance…
Two dominant alleles affect the phenotype in separate, distinguishable ways
Red and White carnations making a pink offspring is an example of?
Incomplete dominance
ABO blood group is an example of?
Multiple alleles
Cystic fibrosis and sickle-cell diseases are examples of?
Pleiotropic
In Epistasis..
A gene at one locus alters the phenotypic expression of a gene at a second locus
Example of Epistasis
Coat color
One gene determined coat color
The other determines whether the pigment will be deposited
What are quantitative characters?
Those that vary in the population along a continuum
Polygenic Inheritance is indicated by…
Quantitative variation
What is Polygenic Inheritance?
An additive effect of two or more genes on a single phenotype
Skin color is an example of?
Polygenic Inheritance
What is the norm of reaction?
The phenotypic range of a genotype informed by the environment
Norms of reaction ate generally broad due to?
Multifactorial
Flowers that change color with soil acidity is an example of
Norm of reaction
Multifactorials
Heart diseases and cancer are an example of?
Norm of reaction
Multifactors
What is a pedigree?
A family tree that describes the interrelationships of parents and children across generations
What are 2 disease where parents may be carrier’s?
Cystic fibrosis
Sickle cell
Symptoms for cystic fibrosis and sickle cell vary because?
Pleiotrophy
What are 2 tests for identifying carriers?
Amniocentesis (liquid that bathes the fetus)
Chorionic villus sampling (placenta)
