Lecture 11: Dihybrid cross, incomplete dominance, codominance

Monohybrid cross with simple Mendelian inheritance F2 generation will display a

Genotypic ratio_____

Phenotypic ratio ___

-1:2:1

-3:1

During _____, homologous chromosomes are separated in ________

Meiosis

How many alleles of each gene can be in a gamete?

1

Dihybrid Cross is when parents only differ in___

-two traits

The F1 generation of a Dihybrid will display the ______ trait

dominant

The F2 generation of a Dihybrid will display ________ phenotypic ratio

9:3:3:1

Simple Mendelian Inheritance patterns are Only Possible If

Trait is only influenced by ____ gene

Gene influencing the trait only has __ alleles

Clear _____-______ relationship

Gamates with either allele are ____

Gametes combine ___

Each phenotype is _____ viable

-single

-2

2

dominant-recessive

-equally likely

-randomly

-equally

Incomplete dominance is when parents with ___ phenotypes produce offspring with a _____ phenotype

2 different

third( completely different from parents)

phenotype that is a blend of the parents'

*only occur if parents genes are homozygous and produce a heterozygous offspring

Color gene produces a protein enzyme that creates a ___ pigment called ____

-plant

-anthocyanin

R allele is associated with…

high anthocyanin production

W allele is associated with…

low anthocyanin production

Codominance is when heterozygote will have _____

both phenotypes

Glycosylation is when

sugar is added to the surface of red blood cell

3 alleles of the I gene:

IA: ___ sugar

IB: __ sugar

Ii: __sugar

-galactosamine (Blood Type A)

-galactose (Blood Type B

-add no (Blood Type: O)

IA/IB are dominant

Blood Type A/B is known as ________. Galactose +Galactosamine are displayed on the Red Blood Cells

codominant