Free Printable Punnett Square Quiz

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Punnett Square Quiz - Summer Biology

Total questions: 20

Worksheet time: 28mins

Name

Class

Date

Aa, DD, Ba, and yy are all examples of ---

genotypes

phenotypes

Which of the following is a phenotype?

red hair

heterozygous

DNA

An allele whose trait always shows up in the organism when the allele is present. The "stronger" gene.

Dominant Allele

Recessive Allele

Which of the following genotypes is heterozygous?

An organism’s physical appearance, or visible traits.

Genotype

Phenotype

Beanotype

Notype

Which of the following is homozygous dominant?

What allele combination should go in the missing box?

none of these

T - tall and t = short
In the punnett square below, what belongs in the missing square

In a certain species of plant, the color purple (P) is dominant to the color white (p).
According to the Punnett Square, what is the probability of an offspring being purple?

25%

100%

50%

10.

B = brown fur b = white fur
In the punnett square, what is the probability for white fur?

25%

50%

75%

11.

A student did an experiment to determine the genetic ratios between tall pea plants (Dd) and a dwarf pea plant (dd). What phenotypic ratio is expected from the cross between the plants?

2 tall pea plants, 2 dwarf pea plants

3 dwarf pea plants, 1 tall pea plant

3 tall pea plants, 1 dwarf pea plant

4 tall pea plants, 0 dwarf pea plants

12.

What are the possible phenotype(s) of the offspring? (A-Brown hair; a-blond hair)

50 % Brown Hair and 50% Blond Hair

25 % Brown Hair and 75% Blond Hair

75 % Brown Hair and 25% Blond Hair

0% Brown Hair and 100% Blond Hair

13.

In plants, tall (T) is dominant to short (t). Perform the following cross: Tt x Tt. What is the probability of producing a short plant?

25%

50%

75%

14.

What is ratio of the offspring from the cross shown will be homozygous recessive for the trait of tallness? T = tall t = short

0 in 4

1 in 4

2 in 4

4 in 4

15.

Brown eyes are dominant over blue eyes. What is the probability that the offspring will have brown eyes in this cross?

25%

50%

75%

100%

16.

Black fur(B) in guinea pigs is dominant over white fur(b). Find the probability of an offspring with the same phenotype as its parents in a cross between a homozygous black and a heterozygous black guinea pig.

25%

50%

75%

100%

17.

In a flowering plant species, red flower color (R) is dominant over white flower color (r). What is the genotype of any white-flowering plant resulting from this species?

18.

In the punnett square shown, what must the genotype of the missing parent be?

19.

A heterozygous long-tusked elephant is crossed with a homozygous recessive short-tusked elephant. What is the probability of the offspring having short tusks?

25%

50%

75%

20.

Black fur(B) in guinea pigs is dominant over white fur(b). Find the probability of a white offspring in a cross between two heterozygous guinea pigs.

25%

50%

75%

100%

Reset

Punnett Square Quiz - Summer Biology

Total questions: 20

Worksheet time: 28mins

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