WorksheetsPunnett Squares and Pedigre
Total questions: 20
Worksheet time: 34mins
George Guinea Pig met Greta Guinea Pig at a picnic. George is heterozygous for his long hair, but Greta has short hair. What are the chances of having a baby guinea pig with short hair?
100%
75%
50%
25%
George Guinea Pig met Greta Guinea Pig at a dance. George is heterozygous for his long hair, but Greta has short hair. What are the chances that their baby would have long hair?
100%
75%
50%
25%
Stuart Snail is heterozygous for tall eyeballs. Sally Snail has tall eyeballs but does carry the recessive allele. What are the chances that their baby snail would have short eyeballs?
75%
50%
25%
0%
Stuart Snail is heterozygous for tall eyeballs. Sally Snail has tall eyeballs but does carry the recessive allele. If their baby snail has tall eyeballs then what is/are the possible genotype(s) he could have?
TT
TT , Tt
TT, Tt, tt
tt
Gary Goldfish is heterozygous for dark orange color. Ginny Goldfish is homozygous dominant. Their baby has light orange color. Is Gary the father?
Yes, because the light orange color is dominant
No, because there is no way they could produce a homozygous recessive baby
Yes, because Ginny has two alleles for light orange color, so their baby could be light orange
No, because Gary does not have the allele for light color.
Gary Goldfish is heterozygous for dark orange color. Ginny Goldfish is homozygous dominant. What is the chance that they will have a heterozygous offspring?
100%
75%
50%
25%
What are the possible genotypes for this cross?
TT = 25% Tt= 50% tt=25%
all tall
TT= 75% tt = 25%
Tt = 100%
If brown eyes are dominant over blue eyes, what would be the parent genotypes if two heterozygous brown eyed persons were crossed?
BB and bb
BB and Bb
Bb and Bb
bb and Bb
Green is dominant to yellow. Two heterozygous green plants are crossed. What are the genotypes of the offspring?
100% Gg
50% GG, 50% Gg
25% GG, 50% Gg, 25% gg
75% Gg, 25% gg
A red flowered plant (RR) breeds with a White flowered plant (WW). The gene for petal color in these plants expresses incomplete dominance. What percentage of the offspring will have pink (RW) flowers?
0%
25%
50%
100%
What you see, or the physical appearance.
Genotype
Phenotype
Homozygous
Heterozygous
In a heterozygous genotype, the ___________ allele takes over in the phenotype.
recessive
dominant
lower case letter
both
B = brown eyes
b = blue eyes
What is true about these two brothers that have brown eyes?
One has genotype BB the other Bb.
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 the Punnett square, what is the probability for white fur?
G=green scales; g= white scales
What offspring do you get when you cross a 2 heterozygous parents?
GG, gg
GG, Gg, gg
Gg, GG
Gg
Gg, gg
