Studied by 0 people
Looks like no one added any tags here yet for you.
Codominance
two different alleles for a gene are both expressed in the heterozygotes
What is an example of codominance in humans?
blood type. So the alleles IA and IB results in blood type AB (codominant)
Partial or incomplete dominance
essentially showing the blending theory (e.g. red and white flower offspring are pink)
What is the underlying molecular biology of partial or incomplete dominance?
Essentially the dominant allele (“R“) will encode for production of the red pigment. So RR will produce more red pigment than Rr. Therefore, Rr will give the “intermediate“ phenotype.
What could be the genotypes of blood type A? How about the antibodies made?
With the genotype of IAIA or IAIO, the antibodies made are Anti-B
How do we determine the probability that two independent events will BOTH happen?
multiply the probabilities of the individual events
How do we determine the probability of an event that can occur in two or more different ways?
find the sum of the individual probabilities of those ways.
Genetic interaction
the idea that several genes influence a particular characteristic
Epistasis
occur when the alleles of one gene cover up or alter the expression of alleles of another gene (e.g. coat color in mice)
What is 2nd form of epistasis?
two genes that are mutually dependent - the expression of each depends on the alleles of the other - complementary genes
