lab 3 lab exam

what is a test cross

heterozygote to a homozygote recessive

what is the result of epistasis

alteration of the characteristic ratios we expect from the dihybrid cross

what is epistasis

a mutation in a gene that causes a different phenotypic expression of a related gene

what is the outcome of a dihybrid cross when there is an epistatic relationship between the two genes

9:7

what gene in the adenine pathway causes a red coloration in yeast

the ade2 gene does this

what are the 2 different maize kernel color pathways

one is the pathway that determines endosperm color while the other is the pathway that is required for determining the aleurone color

when can endosperm be observed

when aleurone is colorless

what are the two alleles for endosperm color, and what colors do they lead to

Y and y

even one Y → yellow

yy → white

what are the locuses for the aleurone color and which lead to a red color aleurone

C → R → A → P

loss of function on the P locus

what type of allele is C’

it is a dominant yet non functional allele that results in a colorless aleurone

what does it mean if your calculated value is greater than the critical value for chi square test

that the hypothesis is rejected

what is the dihybrid cross ratio for a dominant epistatic relationship

12:3

what is the dihybrid cross ratio for recessive epistatic relationship

9:3:4

what is the dihybrid cross ratio for a dominant and recessive epistatic relationship

9:3:4

what is the dihybrid cross ratio for a duplicate dominant epistasis

15:1

what is the dihybrid cross ratio for a duplicate recessive epistatic ratio

9:7

what about a duplicate dominant and recessive epistatic ratio

13:3