Lecture 14. A Flashcards
1
Q
Codominance
A
A type of inheritance in which heterozygotes fully express both alleles.
Each allele of the gene CODES FOR A slightly DIFFERENT protein
The contributions of both alleles are visible in the phenotype: 2 distinct proteins detected
2
Q
Incomplete dominance
A
A type of inheritance in which the heterozygote has a phenotype intermediate to those of the homozygous parents.
3
Q
pleiotropy
A
1 gene can affect multiple characters
4
Q
Epistasis
A
2 or more genes can affect 1 character
5
Q
Range of Dominance for 1 GENE?
A
Complete
Incomplete
Codominance
6
Q
Complete dominance?
A
Red (R) dominant to white (r) Phenotypes of (ex) RR, Rr are the same
7
Q
Incomplete dominance?
A
Neither allele (CR or CW) is dominant Phenotype homozygote CRCR ǂ heterozygote CRCW or CWCW Heterozygote is intermediate in phenotype
8
Q
examples of incomplete dominance
A
hair- straight, wavy, curly
petal color, red, pink, white
9
Q
codominance vs incomplete dominance
A
Neither allele (CM or CN) is dominant Phenotype homozygote CMCM ǂ heterozygote CMCN or CNCN codom: The contributions of both alleles are visible in the phenotype. incomplete: (intermediate) Not like co-dominance since don’t have some petals that that are red and others that are white
10
Q
example of different alleles at one loci?
A
blood type. a b o
