Chapter 12.6: Extensions to Mendel Flashcards
Define polygenic inheritance
describes a mode of inheritance in which more than one gene affects a trait
What describes a mode of inheritance in which more than one gene affects a trait?
polygenic inheritance
Define continuous variation
variation in a trait that occurs along a continuum such as the trait of height in human beings
What is variation in a trait that occurs along a continuum such as the trait of height in human beings?
continuous variation
Define qualitative trait
a trait that is determined by the effects of more than one gene
What is a trait that is determined by the effects of more than one gene?
qualitative trait
What is pleiotropy?
o An allele that has more than one effect on phenotype
Define incomplete dominance
describes a case in which two or more alleles of a gene do not display clear dominance
What describes a case in which two or more alleles of a gene do not display clear dominance?
incomplete dominance
Define codominance
describes a case in which two or more alleles of a gene are each dominant to other alleles but not to each other
What describes a case in which two or more alleles of a gene are each dominant to other alleles but not to each other?
codominance
What are the sugars exhibited by type A blood?
galactosamine
What are the sugars exhibited by type B blood?
galactose
What are the sugars exhibited by type AB blood?
Both galactose and galactosamine
What are the sugars exhibited by type O blood?
None
