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WorksheetsDihybrid Cross
Total questions: 20
Worksheet time: 13mins
What would be the gametes for the YyRr plant?
YR, YR, yR, yR
YR, Yr, yR, yr
Yy, Rr, YY, RR
yy, rr, yy, rr
What is the genotype that should be in the blank square?
yyRr
YYRR
yyrr
YrYr
Parent 1 is heterozygous for both pea color and shape. Parent 2 is heterozygous for both pea color and shape.
(What do you do first to determine to possible offspring's?)
Foil the genotypes of the parents to get the gametes.
Use the genotypes to fill out the Dihybrid cross
The gametes are just the parent genotypes doubled
The dominant traits will mean that all the gametes will be dominant.
Parent 1 is heterozygous for both pea color and shape. Parent 2 is heterozygous for both pea color and shape.
What are the gametes of both of the parents?
Ea, ea, ea, EA
EA, Ea, eA, ea
ea, ea, eA, eA
eA, eA, EA, EA
Parent 1 is heterozygous for both pea color and shape. Parent 2 is heterozygous for both pea color and shape.
What is the missing gamete for parent 1?
eA
ea
EA
Ea
Parent 1 is heterozygous for both pea color and shape. Parent 2 is heterozygous for both pea color and shape.
What is the missing gamete for parent 2?
eA
ea
EA
Ea
Parent 1 is heterozygous for both pea color and shape. Parent 2 is heterozygous for both pea color and shape.
What should the genotype be for the box with the "?" ?
EEAa
EeAa
eeAa
eeaa
Parent 1 is heterozygous for both pea color and shape. Parent 2 is heterozygous for both pea color and shape.
What should the genotype be for the box with the "?" ?
EEAa
EeAa
eeAa
eeaa
Parent 1 is heterozygous for both pea color and shape. Parent 2 is heterozygous for both pea color and shape.
What should the phenotype be for the box with the "?" ?
Yellow & Smooth
Green & Wrinkled
Green & Smooth
Yellow & Wrinkled
Parent 1 is heterozygous for both pea color and shape. Parent 2 is heterozygous for both pea color and shape.
What should the phenotype be for the box with the "?" ?
Yellow & Smooth
Green & Wrinkled
Green & Smooth
Yellow & Wrinkled
Parent 1 is heterozygous for both pea color and shape. Parent 2 is heterozygous for both pea color and shape.
Which color/genotype is NOT correct?
Parent 1 is heterozygous for both pea color and shape. Parent 2 is heterozygous for both pea color and shape.
Which color/genotype is NOT correct?
Parent 1 is heterozygous for both pea color and shape. Parent 2 is heterozygous for both pea color and shape.
How many offspring will be Wrinkled & Yellow?
4
3
1
9
Parent 1 is heterozygous for both pea color and shape. Parent 2 is heterozygous for both pea color and shape.
How many offspring will be smooth & Yellow?
4
3
1
9
(RRYY x rryy)
R = round seeds, r = wrinkled seeds Y = yellow seeds, y = green seeds
What percent will have Round and Yellow seeds?
A white mouse with red eyes is crossed with a black mouse with brown eyes. The white mouse is recessive for both of its traits. The black mouse is dominant for both of its traits.
This cross would be
BBEE x bbee
BBEe x BbEe
BbEE x BbEe
BBee x BBEE
What percent of the parakeets from this cross look like the first parent in P1?
7
8
9
11
