-
In the cross PpRRYy X PPRryy, what fraction of the offspring will have purple flowers and round, yellow seeds?
1/2
-
What is incomplete dominance?
a form of intermediate inheritance in which one allele for a specific trait is not completely expressed over its paired allele.
-
What is an example of incomplete dominance?
A cross between a red flower and a white flowers resulting in pink flowers.
-
What is the ratio for both genotype and phenotype in incomplete dominance?
1:2:1 ratio
-
What is the definitions for multiple alleles (co-dominance)?
Both alleles affect the phenotype in separate, distinguishable ways
-
IA and IB are co-_______ and both are _____ over i
dominant, dominant
-
Define pleiotrophy:
when a gene affects more than one phenotypic character
-
What is the wide-ranging symptoms of sick-cell disease due to a single gene and example of?
pleiotrophy
-
Effects of alleles of a single gene: (list them)
- dominance relationships
- multiple alleles
- pleiotrophy
-
Effects of two or more gene determining a phenotype: (list them)
- epistasis
- polygenic inheritance
-
Define epistasis:
when a gene at one locus alters the phenotypic expression of a gene at a second locus
-
The ____ gene, which is epistatic to the ____ gene, controls whether or not pigment of any color will be deposited in the hair.
E/e, B/b
-
Define polygenic inheritance:
The determination of a particular characteristic,like height or skin color, by many genes (polygenes), each having a small effect individually
-
The product of a genotype is generally not a rigidly defined phenotype, but a range of phenotypic possibilities also known as _______ which is caused by ______.
the norm reaction, environment
-
What can be tracked in humans through family pedigrees?
genetic traits
-
Albinism is a _______ trait
recessive
-
Achondroplasia is a ______ trait
dominant
|
|
