Exam Review Flashcards
Dominant
The expressed form of a trait
Recessive
Non-expressed form of a trait
Homozygous
Having either both dominant or recessive alleles
Heterozygous
Having a dominant and recessive allele
Genotype
The set of alleles for a given trait
Phenotype
The physical appearance of a trait
Why is Gregor Mendel the father of genetics?
Discovered basic principles of heredity, observations became foundation of modern genetics and study of heredity, considered pioneer in the field of genetics
What is an allele?
Alternative versions of a gene
What is codominance?
When both alleles are expressed (spots)
Incomplete dominance
When phenotype of parent alleles become blended (pink)
What is pleiotrophy
the ability of a gene to affect an organism in many ways: a mutation in one gene effect many other traits
examples of pleiotrophy
Cystic fibrosis
Crohn’s disease
Diabetes
Marfan syndrome
