WorksheetsGenetics- Dihybrid Punnett Squares
Total questions: 25
Worksheet time: 1hrs 28mins
E = brown eyes
e = blue eyes
What is true about these two brothers?
One has genotype Ee the other ee.
they have same phenotype and genotype
they have different genotypes and phenotypes
they have same phenotype but different genotypes
they have same genotype but different phenotypes
In a heterozygous genotype, the ___________ allele will be expressed in the phenotype.
recessive
dominant
lower case letter
both
YOU MUST SHOW YOUR WORK ON NOTEBOOK PAPER FOR THIS QUESTION AND TURN IT IN!
Black fur in mice (B) is dominant to brown fur (b). Short tails (T) are dominant to long tails (t). What percentage of the offspring of the cross BbTt x BBtt will have black fur and long tails?
0%
25%
50%
100%
YOU MUST SHOW YOUR WORK ON NOTEBOOK PAPER FOR THIS QUESTION AND TURN IT IN!
A male beetle has the genotype Ttbb. If this beetle mates with a female with genotype TTBb, what is the chance their offspring will have the genotype TtBb?
0%
25%
50%
75%
YOU MUST SHOW YOUR WORK ON NOTEBOOK PAPER FOR THIS QUESTION AND TURN IT IN!
Cross Two Homozygous plants (RRYY x rryy)
R = round seeds, r = wrinkled seeds
Y = yellow seeds, y = green seeds
What percent will have Round and Yellow seeds?
0%
25%
50%
100%
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
YOU MUST SHOW YOUR WORK ON NOTEBOOK PAPER FOR THIS QUESTION AND TURN IT IN!
What fraction of offspring from the cross AaBB x Aabb will be heterozygous for both traits (ex. AaBb) ?
1/16
1/4
1/2
3/16
Which of the following genotypes are homozygous dominant?
A
Aa
AA
aa
Which of the following genotypes are heterozygous?
Bb
BB
bb
B
